Advise patients to read FDA-approved patient labeling (Medication Guide).
Suicidal Thoughts and Behaviors
Advise patients and caregivers to look for the emergence of suicidal thoughts and behaviors, especially early during doxepin hydrochloride treatment and when the dosage is increased or decreased, and instruct them to report suicidal thinking and behavior to their healthcare provider [see Warnings and Precautions (
5.1
)].
Serotonin Syndrome
Caution patients about the risk of serotonin syndrome particularly with the concomitant use of doxepin hydrochloride and other serotonergic drugs (e.g., other TCAs, SSRIs, SNRIs, triptans, opioids), lithium, tryptophan, buspirone, and 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) [see Warnings and Precautions (
5.2
), Drug Interactions (
7
)]. Instruct patients to contact their healthcare provider or report to the emergency room if they experience signs or symptoms of serotonin syndrome.
Angle-Closure Glaucoma
Advise patients that taking doxepin hydrochloride can cause pupillary dilation, which in susceptible individuals, can trigger angle closure glaucoma. Patients may wish to be examined to determine whether they are susceptible to angle closure, and have a prophylactic procedure (e.g., iridectomy), if they are susceptible [see Warnings and Precautions (
5.3
)].
Effects on Driving and Operating Heavy Machinery
Inform patients that doxepin hydrochloride can cause sedation and caution them against driving a car or operating dangerous machinery while taking doxepin hydrochloride [see Warnings and Precautions (
5.4
)].
Activation of Mania or Hypomania
Advise patients to observe for signs of mania/hypomania activation and instruct them to report such symptoms to the healthcare provider.
Drug Interactions
Inform patients that the use of doxepin hydrochloride and certain other drugs increases the risk of doxepin hydrochloride-associated adverse reactions or alternatively lower doxepin hydrochloride effectiveness. Instruct patients to inform their healthcare provider about all the drugs that they are taking before taking doxepin hydrochloride.
Alcohol Use
Advise patients to avoid the use of alcohol while taking doxepin hydrochloride [see Drug Interactions (
7
)].
Pregnancy
Advise patients that there is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to doxepin hydrochloride during pregnancy. Advise women to notify their healthcare provider if they become pregnant or intend to become pregnant during doxepin hydrochloride treatment.
Advise pregnant women that doxepin hydrochloride use late in pregnancy may increase the risk for neonatal complications requiring prolonged hospitalization, respiratory support, or tube feeding [see Use in Specific Populations (
8.1
)].
Lactation
Advise patients that breastfeeding is not recommended during doxepin hydrochloride treatment [see Use in Specific Populations (
8.2
)].
Important Administration Instructions for the Oral Solution
For patients prescribed Doxepin Hydrochloride Oral Solution, tell them to:
- Use the supplied calibrated dropper to measure the amount of oral solution needed.
- Just prior to administration, mix Doxepin Hydrochloride Oral Solution with 120 mL of water, whole or skimmed milk, or orange, grapefruit, tomato, prune or pineapple juice only. Do not mix with anything other than the liquids listed.
- Administer the dose immediately after mixing.
Distributed by:
Lannett Company, Inc.
Philadelphia, PA 19136
This product’s labeling may have been updated. For the most recent Prescribing Information, please visit
www.lannett.com.
CIB72247B
Rev. 09/2026