TRAZODONE HYDROCHLORIDE- trazodone hydrochloride tablet
Quality Care Products, LLC
HIGHLIGHTS OF PRESCRIBING INFORMATION
These highlights do not include all the information needed to use TRAZODONE HYDROCHLORIDE TABLETS safely and effectively. See full prescribing information for TRAZODONE HYDROCHLORIDE TABLETS.
TRAZODONE HYDROCHLORIDE tablets, for oral use
Initial U.S. Approval: 1981
WARNING: SUICIDAL THOUGHTS and BEHAVIORS
See full prescribing information for complete boxed warning.
INDICATIONS AND USAGE
Trazodone hydrochloride is a selective serotonin reuptake inhibitor indicated for the treatment of major depressive disorder (MDD) ( 1).
DOSAGE AND ADMINISTRATION
DOSAGE FORMS AND STRENGTHS
WARNINGS AND PRECAUTIONS
Most common adverse reactions (incidence ≥ 5% and twice that of placebo) are: edema, blurred vision, syncope, drowsiness, fatigue, diarrhea, nasal congestion, weight loss ( 6).
See 17 for PATIENT COUNSELING INFORMATION and Medication Guide.
FULL PRESCRIBING INFORMATION: CONTENTS*
Antidepressants increased the risk of suicidal thoughts and behaviors in pediatric and young adult patients in short-term studies. Closely monitor all antidepressant-treated patients for clinical worsening, and for emergence of suicidal thoughts and behaviors [see Warnings and Precautions ( 5.1)]. Trazodone hydrochloride tablet is not approved for use in pediatric patients [see Use in Specific Populations ( 8.4)].
Trazodone hydrochloride tablets are indicated for the treatment of major depressive disorder (MDD) in adults.
An initial dose of 150 mg/day in divided doses is suggested. The dosage should be initiated at a low-dose and increased gradually, noting the clinical response and any evidence of intolerance. Occurrence of drowsiness may require the administration of a major portion of the daily dose at bedtime or a reduction of dosage.
The dose may be increased by 50 mg/day every 3 to 4 days. The maximum dose for outpatients usually should not exceed 400 mg/day in divided doses. Inpatients (i.e., more severely depressed patients) may be given up to but not in excess of 600 mg/day in divided doses
Once an adequate response has been achieved, dosage may be gradually reduced, with subsequent adjustment depending on therapeutic response.
Trazodone hydrochloride tablets can be swallowed whole or administered as a half tablet by breaking the tablet along the score line. Trazodone hydrochloride tablets should be taken shortly after a meal or light snack.
Prior to initiating treatment with trazodone hydrochloride tablets or another antidepressant, screen patients for a personal or family history of bipolar disorder, mania, or hypomania [see Warnings and Precautions ( 5.7)].
At least 14 days must elapse between discontinuation of a monoamine oxidase inhibitor (MAOI) antidepressant and initiation of trazodone hydrochloride tablets. In addition, at least 14 days must elapse after stopping trazodone hydrochloride tablets before starting an MAOI antidepressant [see Contraindications ( 4), Warnings and Precautions ( 5.2)].
Coadministration with Strong CYP3A4 Inhibitors
Consider reducing trazodone hydrochloride tablets dose based on tolerability when trazodone hydrochloride tablets are coadministered with a strong CYP3A4 inhibitor [see Drug Interactions ( 7.1)].
Coadministration with Strong CYP3A4 Inducers
Consider increasing trazodone hydrochloride tablets dose based on therapeutic response when trazodone hydrochloride tablets are coadministered with a strong CYP3A4 inducer [see Drug Interactions ( 7.1)].
Adverse reactions may occur upon discontinuation of trazodone hydrochloride tablets [See Warnings and Precautions ( 5.8)]. Gradually reduce the dosage rather than stopping trazodone hydrochloride tablets abruptly whenever possible.
Trazodone hydrochloride tablets, USP having functional scoring are available in the following strengths:
Trazodone hydrochloride tablets are contraindicated in:
In pooled analyses of placebo-controlled trials of antidepressant drugs (SSRIs and other antidepressant classes) that included approximately 77,000 adult patients and over 4,400 pediatric patients, the incidence of suicidal thoughts and behaviors in pediatric and young adult patients was greater in antidepressant-treated patients than in placebo-treated patients. The drug-placebo differences in the number of cases of suicidal thoughts and behaviors per 1000 patients treated are provided in Table 1.
No suicides occurred in any of the pediatric studies. There were suicides in the adult studies, but the number was not sufficient to reach any conclusion about antidepressant drug effect on suicide.
|Drug-Placebo Difference in Number of Patients of
Suicidal Thoughts or Behaviors per 1000 Patients Treated
|Increases Compared to Placebo|
|<18||14 additional patients|
|18 to 24||5 additional patients|
|Decreases Compared to Placebo|
|25 to 64||1 fewer patient|
|≥65||6 fewer patients|
It is unknown whether the risk of suicidal thoughts and behaviors in pediatric and young adult patients extends to longer-term use, i.e., beyond four months. However, there is substantial evidence from placebo-controlled maintenance trials in adults with MDD that antidepressants delay the recurrence of depression.
Monitor all antidepressant-treated patients for clinical worsening and emergence of suicidal thoughts and behaviors, especially during the initial few months of drug therapy and at times of dosage changes. Counsel family members or caregivers of patients to monitor for changes in behavior and to alert the healthcare provider. Consider changing the therapeutic regimen, including possibly discontinuing trazodone hydrochloride tablets, in patients whose depression is persistently worse, or who are experiencing emergent suicidal thoughts or behaviors.
Serotonin-norepinephrine reuptake inhibitors (SNRIs) and SSRIs, including trazodone hydrochloride, can precipitate serotonin syndrome, a potentially life-threatening condition. The risk is increased with concomitant use of other serotonergic drugs (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, amphetamines, and St. John’s Wort) and with drugs that impair metabolism of serotonin, i.e., MAOIs [see Contraindications ( 4), Drug Interactions ( 7.1)]. Serotonin syndrome can also occur when these drugs are used alone.
Serotonin syndrome signs and symptoms may include mental status changes (e.g., agitation, hallucinations, delirium, and coma), autonomic instability (e.g., tachycardia, labile blood pressure, dizziness, diaphoresis, flushing, hyperthermia), neuromuscular symptoms (e.g., tremor, rigidity, myoclonus, hyperreflexia, incoordination), seizures, and gastrointestinal symptoms (e.g., nausea, vomiting, diarrhea).
The concomitant use of trazodone hydrochloride tablets with MAOIs is contraindicated. In addition, do not initiate trazodone hydrochloride tablets in a patient being treated with MAOIs such as linezolid or intravenous methylene blue. No reports involved the administration of methylene blue by other routes (such as oral tablets or local tissue injection). If it is necessary to initiate treatment with an MAOI such as linezolid or intravenous methylene blue in a patient taking trazodone hydrochloride tablets, discontinue trazodone hydrochloride tablets before initiating treatment with the MAOI [see Contraindications ( 4), Drug Interactions ( 7.1)].
Monitor all patients taking trazodone hydrochloride tablets for the emergence of serotonin syndrome. Discontinue treatment with trazodone hydrochloride tablets and any concomitant serotonergic agents immediately if the above symptoms occur, and initiate supportive symptomatic treatment. If concomitant use of trazodone hydrochloride tablets with other serotonergic drugs is clinically warranted, inform patients of the increased risk for serotonin syndrome and monitor for symptoms.
Clinical studies indicate that trazodone hydrochloride may be arrhythmogenic in patients with preexisting cardiac disease. Arrhythmias identified include isolated PVCs, ventricular couplets, tachycardia with syncope, and torsade de pointes. Postmarketing events, including torsade de pointes have been reported at doses of 100 mg or less with the immediate-release form of trazodone hydrochloride tablets. Trazodone hydrochloride tablets should also be avoided in patients with a history of cardiac arrhythmias, as well as other circumstances that may increase the risk of the occurrence of torsade de pointes and/or sudden death, including symptomatic bradycardia, hypokalemia or hypomagnesemia, and the presence of congenital prolongation of the QT interval.
Trazodone hydrochloride tablets are not recommended for use during the initial recovery phase of myocardial infarction. Caution should be used when administering trazodone hydrochloride tablets to patients with cardiac disease and such patients should be closely monitored, since antidepressant drugs (including trazodone hydrochloride) may cause cardiac arrhythmias [see Adverse Reactions ( 6.2)].
Trazodone hydrochloride prolongs the QT/QTc interval. The use of trazodone hydrochloride tablets should be avoided in patients with known QT prolongation or in combination with other drugs that are inhibitors of CYP3A4 (e.g., itraconazole, clarithromycin, voriconazole), or known to prolong QT interval including Class 1A antiarrhythmics (e.g., quinidine, procainamide) or Class 3 antiarrhythmics (e.g., amiodarone, sotalol), certain antipsychotic medications (e.g., ziprasidone, chlorpromazine, thioridazine), and certain antibiotics (e.g., gatifloxacin). Concomitant administration of drugs may increase the risk of cardiac arrhythmia [see Drug Interactions ( 7.1)].
Hypotension, including orthostatic hypotension and syncope has been reported in patients receiving trazodone hydrochloride. Concomitant use with an antihypertensive may require a reduction in the dose of the antihypertensive drug.
Drugs that interfere with serotonin reuptake inhibition, including trazodone hydrochloride, increase the risk of bleeding events. Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDS), other antiplatelet drugs, warfarin, and other anticoagulants may add to this risk. Case reports and epidemiological studies (case-control and cohort design) have demonstrated an association between use of drugs that interfere with serotonin reuptake and the occurrence of gastrointestinal bleeding. Bleeding events related to drugs that interfere with serotonin reuptake have ranged from ecchymosis, hematoma, epistaxis, and petechiae to life-threatening hemorrhages.
Inform patients about the risk of bleeding associated with the concomitant use of trazodone hydrochloride tablets and antiplatelet agents or anticoagulants. For patients taking warfarin, carefully monitor coagulation indices when initiating, titrating, or discontinuing trazodone hydrochloride tablets.
Cases of priapism (painful erections greater than 6 hours in duration) have been reported in men receiving trazodone hydrochloride tablets. Priapism, if not treated promptly, can result in irreversible damage to the erectile tissue. Men who have an erection lasting greater than 4 hours, whether painful or not, should immediately discontinue the drug and seek emergency medical attention [see Adverse Reactions ( 6.2), Overdosage ( 10)].
Trazodone hydrochloride tablets should be used with caution in men who have conditions that might predispose them to priapism (e.g., sickle cell anemia, multiple myeloma, or leukemia), or in men with anatomical deformation of the penis (e.g., angulation, cavernosal fibrosis, or Peyronie’s disease).
In patients with bipolar disorder, treating a depressive episode with trazodone hydrochloride or another antidepressant may precipitate a mixed/manic episode. Activation of mania/hypomania has been reported in a small proportion of patients with major affective disorder who were treated with antidepressants. Prior to initiating treatment with trazodone hydrochloride tablets, screen patients for any personal or family history of bipolar disorder, mania, or hypomania [see Dosage and Administration ( 2.3)].
Adverse reactions after discontinuation of serotonergic antidepressants, particularly after abrupt discontinuation, include: nausea, sweating, dysphoric mood, irritability, agitation, dizziness, sensory disturbances (e.g., paresthesia, such as electric shock sensations), tremor, anxiety, confusion, headache, lethargy, emotional lability, insomnia, hypomania, tinnitus, and seizures. A gradual reduction in dosage rather than abrupt cessation is recommended whenever possible [See Dosage and Administration ( 2.6)].
Trazodone hydrochloride may cause somnolence or sedation and may impair the mental and/or physical ability required for the performance of potentially hazardous tasks. Patients should be cautioned about operating hazardous machinery, including automobiles, until they are reasonably certain that the drug treatment does not affect them adversely.
The pupillary dilation that occurs following use of many antidepressant drugs including trazodone hydrochloride may trigger an angle closure attack in a patient with anatomically narrow angles who does not have a patent iridectomy. Avoid use of antidepressants, including trazodone hydrochloride, in patients with untreated anatomically narrow angles.
Hyponatremia may occur as a result of treatment with SNRIs and SSRIs, including trazodone hydrochloride. Cases with serum sodium lower than 110 mmol/L have been reported. Signs and symptoms of hyponatremia include headache, difficulty concentrating, memory impairment, confusion, weakness, and unsteadiness, which can lead to falls. Signs and symptoms associated with more severe and/or acute cases have included hallucination, syncope, seizure, coma, respiratory arrest, and death. In many cases, this hyponatremia appears to be the result of the syndrome of inappropriate antidiuretic hormone secretion (SIADH).
In patients with symptomatic hyponatremia, discontinue trazodone hydrochloride tablets and institute appropriate medical intervention. Elderly patients, patients taking diuretics, and those who are volume-depleted may be at greater risk of developing hyponatremia with SSRIs and SNRIs [see Use in Specific Populations ( 8.5)].
The following serious adverse reactions are described elsewhere in the labeling:
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
Other adverse reactions occurring at an incidence of <2% with the use of trazodone hydrochloride in the controlled clinical studies: akathisia, allergic reaction, anemia, chest pain, delayed urine flow, early menses, flatulence, hallucinations/delusions, hematuria, hypersalivation, hypomania, impaired memory, impaired speech, impotence, increased appetite, increased libido, increased urinary frequency, missed periods, muscle twitches, numbness, paresthesia, retrograde ejaculation, shortness of breath, and tachycardia/palpitations. Occasional sinus bradycardia has occurred in long-term studies.
The following adverse reactions have been identified during post-approval use of trazodone hydrochloride tablets. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency or establish a causal relationship to drug exposure:
Blood and lymphatic system disorders: hemolytic anemia, leukocytosis
Cardiac disorders: cardiospasm, congestive heart failure, conduction block, orthostatic hypotension and syncope, palpitations, bradycardia, atrial fibrillation, myocardial infarction, cardiac arrest, arrhythmia, ventricular ectopic activity, including ventricular tachycardia and QT prolongation. Prolonged QT interval, torsade de pointes, and ventricular tachycardia have been reported at doses of 100 mg per day or less [see Warnings and Precautions ( 5.3)].
Endocrine disorders: inappropriate ADH syndrome
Eye disorders: diplopia
Gastrointestinal disorders: increased salivation, nausea/vomiting
General disorders and administration site conditions: chills, edema, unexplained death, weakness
Hepatobiliary disorders: cholestasis, jaundice, hyperbilirubinemia, liver enzyme alterations
Investigations: increased amylase
Metabolism and nutrition disorders: methemoglobinemia
Nervous system disorders: aphasia, ataxia, cerebrovascular accident, extrapyramidal symptoms, grand mal seizures, paresthesia, tardive dyskinesia, vertigo
Psychiatric disorders: abnormal dreams, agitation, anxiety, hallucinations, insomnia, paranoid reaction, psychosis, stupor
Renal and urinary disorders: urinary incontinence, urinary retention
Reproductive system and breast disorders: breast enlargement or engorgement, clitorism, lactation, priapism [see Warnings and Precautions ( 5.6)]
Respiratory, thoracic and mediastinal disorders: apnea
Skin and subcutaneous tissue disorders: alopecia, hirsutism, leukonychia, pruritus, psoriasis, rash, urticaria
Vascular disorders: vasodilation
|Monoamine Oxidase Inhibitors (MAOIs)|
|Clinical Impact:||The concomitant use of MAOIs and serotonergic drugs including trazodone hydrochloride increases the risk of serotonin syndrome.|
|Intervention:||Trazodone hydrochloride is contraindicated in patients taking MAOIs, including MAOIs such as linezolid or intravenous methylene blue [see Contraindications ( 4), Dosage and Administration ( 2.3, 2.4), and Warnings and Precautions ( 5.2)].|
|Examples:||isocarboxazid, moclobemide, phenelzine, selegiline, tranylcypromine|
|Other Serotonergic Drugs|
|Clinical Impact:||The concomitant use of serotonergic drugs including trazodone hydrochloride and other serotonergic drugs increases the risk of serotonin syndrome.|
|Intervention:||Monitor patients for signs and symptoms of serotonin syndrome, particularly during trazodone hydrochloride initiation. If serotonin syndrome occurs, consider discontinuation of trazodone hydrochloride and/or concomitant serotonergic drugs [see Warnings and Precautions ( 5.2)].|
|Examples:||triptans, antidepressants (tricyclic and serotonin uptake inhibitors), fentanyl, lithium, tramadol, tryptophan, buspirone, and St. John's Wort|
|Antiplatelet Agents and Anticoagulants|
|Clinical Impact:||Serotonin release by platelets plays an important role in hemostasis. The concurrent use of an antiplatelet agent or anticoagulant with trazodone hydrochloride may potentiate the risk of bleeding.|
|Intervention:||Inform patients of the increased risk of bleeding with the concomitant use of trazodone hydrochloride and antiplatelet agents and anticoagulants. For patients taking warfarin, carefully monitor the international normalized ratio (INR) when initiating or discontinuing trazodone hydrochloride [see Warnings and Precautions ( 5.5)].|
|Examples:||warfarin, rivaroxaban, dabigatran, clopidogrel|
|Strong CYP3A4 Inhibitors|
|Clinical Impact:||The concomitant use of trazodone hydrochloride and strong CYP3A4 inhibitors increased the exposure of trazodone compared to the use of trazodone hydrochloride alone.|
|Intervention:||If trazodone hydrochloride is used with a potent CYP3A4 inhibitor, the risk of adverse reactions, including cardiac arrhythmias, may be increased and a lower dose of trazodone hydrochloride should be considered [see Dosage and Administration ( 2.5), Warnings and Precautions ( 5.3)].|
|Examples:||itraconazole, ketoconazole, clarithromycin, indinavir|
|Strong CYP3A4 Inducers|
|Clinical Impact:||The concomitant use of trazodone hydrochloride and strong CYP3A4 inducers decreased the exposure of trazodone compared to the use of trazodone hydrochloride alone.|
|Intervention:||Patients should be closely monitored to see if there is a need for an increased dose of trazodone hydrochloride when taking CYP3A4 inducers [see Dosage and Administration ( 2.5)].|
|Examples:||rifampin, carbamazepine, phenytoin, St. John’s wort|
|Digoxin and Phenytoin|
|Clinical Impact:||Digoxin and phenytoin are narrow therapeutic index drugs. Concomitant use of trazodone hydrochloride can increase digoxin or phenytoin concentrations.|
|Intervention:||Measure serum digoxin or phenytoin concentrations before initiating concomitant use of trazodone hydrochloride. Continue monitoring and reduce digoxin or phenytoin dose as necessary.|
|Central Nervous System (CNS) Depressants|
|Clinical Impact:||Trazodone hydrochloride may enhance the response CNS depressants.|
|Intervention:||Patients should be counseled that trazodone hydrochloride may enhance the response to alcohol, barbiturates, and other CNS depressants.|
|QT Interval Prolongation|
|Clinical Impact:||Concomitant use of drugs that prolong the QT interval may add to the QT effects of trazodone hydrochloride and increase the risk of cardiac arrhythmia.|
|Intervention:||Avoid the use of trazodone hydrochloride tablets in combination with other drugs known to prolong QTc [see Warnings and Precautions ( 5.3)].|
|Examples:||Class 1A antiarrhythmics: quinidine, procainamide, disopyramide; Class 3 antiarrhythmics: amiodarone, sotalol; Antipsychotics: ziprasidone, chlorpromazine, thioridazine; Antibiotics: gatifloxacin|
Pregnancy Exposure Registry
There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to antidepressants during pregnancy.
Healthcare providers are encouraged to register patients by calling the National Pregnancy Registry for Antidepressants at 1-844-405-6185 or visiting online at https://womensmentalhealth.org/clinical-and-research-programs/pregnancyregistry/antidepressants/
Published prospective cohort studies, case series, and case reports over several decades with trazodone use in pregnant women have not identified any drug-associated risks of major birth defects, miscarriage, or adverse maternal or fetal outcomes (see Data).
Trazodone hydrochloride has been shown to cause increased fetal resorption and other adverse effects on the fetus in the rat when given at dose levels approximately 7.3 to 11 times the maximum recommended human dose (MRHD) of 400 mg/day in adults on a mg/m 2 basis. There was also an increase in congenital anomalies in the rabbit at approximately 7.3 to 22 times the MRHD on a mg/m 2 basis (see Data).
The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.
Disease-associated maternal and/or embryofetal risk
A prospective, longitudinal study followed 201 pregnant women with a history of major depressive disorder who were euthymic and taking antidepressants at the beginning of pregnancy. The women who discontinued antidepressants during pregnancy were more likely to experience a relapse of major depression that women who continued antidepressants. Consider the risk of untreated depression when discontinuing or changing treatment with antidepressant medication during pregnancy and postpartum.
While available studies cannot definitively establish the absence of risk, published data from prospective cohort studies, case series, and case reports over several decades have not identified an association with trazodone use during pregnancy and major birth defects, miscarriage, or other adverse maternal or fetal outcomes. All available studies have methodological limitations, including small sample size and inconsistent comparator groups.
No teratogenic effects were observed when trazodone was given to pregnant rats and rabbits during the period of organogenesis at oral doses up to 450 mg/kg/day. This dose is 11 and 22 times, in rats and rabbits, respectively, the maximum recommended human dose (MRHD) of 400 mg/day in adults on a mg/m 2 basis. Increased fetal resorption and other adverse effects on the fetus in rats at 7.3 to 11 times the MRHD and increase in congenital anomalies in rabbits at 7.3 to 22 times the MRHD on a mg/m 2 basis were observed. No further details on these studies are available.
Data from published literature report the transfer of trazodone into human milk. There are no data on the effect of trazodone on milk production. Limited data from postmarketing reports have not identified and association of adverse effects on the breastfed child.
The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for trazodone and any potential adverse effects on the breastfed child from trazodone or from the underlying maternal condition.
Safety and effectiveness in the pediatric population have not been established. Antidepressants increased the risk of suicidal thoughts and behaviors in pediatric patients [ see Boxed Warning, Warnings and Precautions ( 5.1)].
Reported clinical literature and experience with trazodone has not identified differences in responses between elderly and younger patients. However, as experience in the elderly with trazodone hydrochloride is limited, it should be used with caution in geriatric patients.
Serotonergic antidepressants have been associated with cases of clinically significant hyponatremia in elderly patients, who may be at greater risk for this adverse reaction [ see Warnings and Precautions ( 5.11) ].
Trazodone has not been studied in patients with renal impairment. Trazodone should be used with caution in this population.
Death from overdose has occurred in patients ingesting trazodone hydrochloride and other CNS depressant drugs concurrently (alcohol; alcohol and chloral hydrate and diazepam; amobarbital; chlordiazepoxide; or meprobamate).
The most severe reactions reported to have occurred with overdose of trazodone hydrochloride alone have been priapism, respiratory arrest, seizures, and ECG changes, including QT prolongation. The reactions reported most frequently have been drowsiness and vomiting. Overdosage may cause an increase in incidence or severity of any of the reported adverse reactions.
There is no specific antidote for trazodone hydrochloride overdose. In managing overdosage, consider the possibility of multiple drug involvement. For current information on the management of poisoning or overdose, contact a poison control center (1-800-222-1222 or www.poison.org).
Trazodone hydrochloride tablets, USP for oral administration contain trazodone hydrochloride, a selective serotonin reuptake inhibitor and 5HT 2 receptor antagonist. Trazodone hydrochloride is a triazolopyridine derivative designated as 2-[3-[4-(3-chlorophenyl)-1 piperazinyl]propyl]-1,2,4-triazolo [4,3-a]pyridin-3(2 H)-one hydrochloride. It is a white odorless crystalline powder which is freely soluble in water. The structural formula is represented as follows:
Each tablet, for oral administration, contains 50 mg, 100 mg, 150 mg or 300 mg of trazodone hydrochloride, USP. In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, pregelatinized starch (maize), and sodium starch glycolate.
The mechanism of trazodone’s antidepressant action is not fully understood, but is thought to be related to its enhancement of serotonergic activity in the CNS. Trazodone is both a selective serotonin reuptake inhibitor (SSRI) and a 5HT 2 receptor antagonist and the net result of this action on serotonergic transmission and its role in trazodone’s antidepressant effect is unknown.
Preclinical studies have shown that trazodone selectively inhibits neuronal reuptake of serotonin (Ki = 367 nM) and acts as an antagonist at 5-HT 2A (Ki = 35.6 nM) serotonin receptors. Trazodone is also an antagonist at several other monoaminergic receptors including 5-HT 2B (Ki = 78.4 nM), 5-HT 2C (Ki = 224 nM), α 1A (Ki = 153 nM), α 2C (Ki = 155 nM) receptors and it is a partial agonist at 5 HT 1A (Ki = 118 nM) receptor.
Trazodone antagonizes alpha 1-adrenergic receptors, a property which may be associated with postural hypotension.
In humans, trazodone hydrochloride is absorbed after oral administration without selective localization in any tissue. When trazodone hydrochloride is taken shortly after ingestion of food, there may be an increase in the amount of drug absorbed, a decrease in maximum concentration and a lengthening in the time to maximum concentration. Peak plasma levels occur approximately one hour after dosing when trazodone hydrochloride is taken on an empty stomach or 2 hours after dosing when taken with food.
In vitro studies in human liver microsomes show that trazodone is metabolized, via oxidative cleavage, to an active metabolite, m- chlorophenylpiperazine (mCPP) by CYP3A4. Other metabolic pathways that may be involved in the metabolism of trazodone have not been well characterized. Trazodone is extensively metabolized; less than 1% of an oral dose is excreted unchanged in the urine.
In some patients trazodone may accumulate in the plasma.
Trazodone is 89 to 95% protein bound in vitro at concentrations attained with therapeutic doses in humans.
No drug- or dose-related occurrence of carcinogenesis was evident in rats receiving trazodone in daily oral doses up to 7.3 times the maximum recommended human dose (MRHD) of 400 mg/day in adult on mg/m 2 basis.
No genotoxicity studies were conducted with trazodone.
Impairment of Fertility
Trazodone has no effect on fertility in rats at doses up to 7.3 times the MRHD in adults on mg/m 2 basis in adolescents.
The efficacy and safety of trazodone hydrochloride were established from inpatient and outpatient trials of the trazodone immediate release formulation in the treatment of major depressive disorder.
Trazodone hydrochloride tablets, USP 50 mg having functional scoring are available for oral administration as white to off white, round, biconvex, uncoated tablets Engraved “IT” bisect “50” on one side and plain on the other side.
Trazodone hydrochloride tablets, USP 100 mg having functional scoring are available for oral administration as white to off white, round, biconvex, uncoated tablets Engraved “IT” bisect “100” on one side and plain on the other side.
Trazodone hydrochloride tablets, USP 150 mg having functional scorings are available for oral administration as white to off white, oval, flat faced bevelled edge uncoated tablets with full bisect and two partial trisects engraved “IT” and “150” on one side and two trisect engraved “50 50 50” on each part with middle “50” perpendicular to the other on other side.
Directions for using the correct score when breaking the tablet, please refer to the following:
-For 50 mg, break the score on either the left or right side of the tablet (one-third of a tablet).
-For 75 mg, break the score down the middle of the tablet (one-half of a tablet).
-For 100 mg, break the score on either the left or right side of the tablet (two-thirds of a tablet).
-For 150 mg, use the entire tablet.
Trazodone hydrochloride tablets, USP 300 mg having functional scorings are available for oral administration as white to off white, oval, flat faced bevelled edge uncoated tablets with full bisect and two partial trisects engraved “IT” and “300” on one side and two trisect engraved “100 100 100” on each part with middle “100” perpendicular to the other on other side.
Directions for using the correct score when breaking the tablet, please refer to the following:
-For 100 mg, break the score on either the left or right side of the tablet (one-third of a tablet).
-For 150 mg, break the score down the middle of the tablet (one-half of a tablet).
-For 200 mg, break the score on either the left or right side of the tablet (two-thirds of a tablet).
-For 300 mg, use the entire tablet.
Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature]. Dispense with a child-resistant closure in a tight, light-resistant container.
Advise the patient to read the FDA-approved patient labeling (Medication Guide).
Suicidal Thoughts and Behaviors
Advise patients and caregivers to look for the emergence of suicidality, especially early during treatment and when the dosage is adjusted up or down and instruct them to report such symptoms to the healthcare provider [see Box Warning and Warnings and Precautions ( 5.1)].
Dosage and Administration
Advise patients that trazodone hydrochloride tablets should be taken shortly after a meal or light snack. Advise patients regarding the importance of following dosage titration instructions [see Dosage and Administration ( 2)].
Caution patients about the risk of serotonin syndrome, particularly with the concomitant use of trazodone hydrochloride tablets with other serotonergic drugs including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, amphetamines, St. John’s Wort, and with drugs that impair metabolism of serotonin (in particular, MAOIs, both those intended to treat psychiatric disorders and also others, such as linezolid). Patients should contact their health care provider or report to the emergency room if they experience signs or symptoms of serotonin syndrome [see Warnings and Precautions ( 5.2) and Drug Interactions ( 7)].
Activation of Mania/Hypomania
Advise patients and their caregivers to observe for signs of activation of mania/hypomania and instruct them to report such symptoms to the healthcare provider [see Warnings and Precautions ( 5.7)].
Increased Risk of Bleeding
Inform patients about the concomitant use of trazodone hydrochloride tablets with aspirin, NSAIDs, other antiplatelet drugs, warfarin, or other anticoagulants because the combined use of drugs that interfere with serotonin reuptake and these medications has been associated with an increased risk of bleeding. Advise them to inform their health care providers if they are taking or planning to take any prescription or over-the-counter medications that increase the risk of bleeding [see Warnings and Precautions ( 5.5)].
Advise patients not to abruptly discontinue trazodone hydrochloride tablets and to discuss any tapering regimen with their healthcare provider. Adverse reactions can occur when trazodone hydrochloride tablets are discontinued [see Warnings and Precautions ( 5.8)].
Advise patients to inform their health care providers if they are taking, or plan to take any prescription or over-the-counter medications since there is a potential for interactions [see Drug Interactions ( 7.1)].
Advise patients to notify their healthcare provider if they become pregnant or intend to become pregnant during therapy with trazodone.
Advise patients that there is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to trazodone during pregnancy [see Use in Special Populations ( 8.1)].
Accord Healthcare, Inc.,
1009 Slater Road,
Durham, NC 27703,
Intas Pharmaceuticals Limited,
Plot No. : 5 to 14, Pharmez,
Nr. Village Matoda,
Bavla Road, Ta.- Sanand,
Dist.- Ahmedabad – 382 213,
51 2487 1 718000
Issued November 2018
Trazodone Hydrochloride Tablets
What is the most important information I should know about trazodone hydrochloride tablets?
Antidepressant medicines, depression or other serious mental illnesses, and suicidal thoughts or actions: Talk to your healthcare provider about:
1. Antidepressant medicines may increase suicidal thoughts or actions in some children, teenagers, and young adults within the first few months of treatment.
2. Depression and other serious mental illnesses are the most important causes of suicidal thoughts and actions. Some people may have a higher risk of having suicidal thoughts or actions.
These include people who have or have a family history of bipolar illness (also called manic- depressive illness) or suicidal thoughts or actions.
3. How can I watch for and try to prevent suicidal thoughts and actions?
Call a healthcare provider right away if you have any of the following symptoms, especially if they are new, worse, or worry you:
What else do I need to know about antidepressant medicines?
It is not known if trazodone hydrochloride tablets are safe and effective in children.
What are trazodone hydrochloride tablets?
Trazodone hydrochloride tablets are a prescription medicine used in adults to treat major depressive disorder (MDD). Trazodone hydrochloride belongs to a class of medicines known as SSRIs (or selective serotonin reuptake inhibitors).
Do not take trazodone hydrochloride tablets:
Before you take trazodone hydrochloride tablets tell your healthcare provider about all of your medical conditions, including if you:
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Using trazodone hydrochloride tablets with certain other medicines can affect each other causing serious side effects.
Especially tell your healthcare provider if you take:
Know the medicines you take. Keep a list of them and show it to your healthcare provider and pharmacist when you get a new medicine.
How should I take trazodone hydrochloride tablets?
What should I avoid while taking trazodone hydrochloride tablets?
What are the possible side effects of trazodone hydrochloride tablets?
Trazodone hydrochloride tablets can cause serious side effects or death, including:
Only some people are at risk for these problems. You may want to undergo an eye examination to see if you are at risk and receive preventative treatment if you are.
Get medical help right away, if you have any of the symptoms listed above.
The most common side effects of trazodone hydrochloride tablets include:
These are not all the possible side effects of trazodone hydrochloride tablets. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
How should I store trazodone hydrochloride tablets?
Keep trazodone hydrochloride tablets and all medicines out of the reach of children.
General information about the safe and effective use of trazodone hydrochloride tablets.
Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use trazodone hydrochloride tablets for a condition for which it was not prescribed. Do not give trazodone hydrochloride tablets to other people, even if they have the same symptoms that you have. It may harm them. You can ask your pharmacist or healthcare provider for information about trazodone hydrochloride tablets that is written for health professionals.
For more information, go to www.accordhealthcare.us or call Accord Healthcare Inc. at 1-866-941-7875.
What are the ingredients in trazodone hydrochloride tablets?
Active ingredient: trazodone hydrochloride, USP
Inactive ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, pregelatinized starch (maize) and sodium starch glycolate.
This Medication Guide has been approved by the U.S. Food and Drug Administration.
Medication guide available at www.accordhealthcare.us/medication-guides
Accord Healthcare, Inc.,
1009 Slater Road,
Durham, NC 27703,
Intas Pharmaceuticals Limited,
Plot No. : 5 to 14, Pharmez,
Nr. Village Matoda,
Bavla Road, Ta.- Sanand,
Dist.- Ahmedabad – 382 213,
51 2487 1 718000
Issued November 2018
trazodone hydrochloride tablet
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