| HIV-1-Antiviral Agents: Nucleoside Reverse Transcriptase Inhibitors (NRTIs) |
| didanosine | ↔ darunavir
↔ didanosine
| Didanosine should be administered one hour before or two hours after PREZISTA/ritonavir (which are administered with food). |
| HIV-1-Antiviral Agents: HIV-Protease Inhibitors (PIs) |
| indinavir | ↑ darunavir
↑ indinavir
| The appropriate dose of indinavir in combination with PREZISTA/ritonavir has not been established. |
| (The reference regimen for indinavir was indinavir/ritonavir 800/100 mg twice daily.) | | |
| lopinavir/ritonavir | ↓ darunavir
↔ lopinavir
| Appropriate doses of the combination have not been established. Hence, it is not recommended to co-administer lopinavir/ritonavir and PREZISTA, with or without ritonavir. |
| saquinavir | ↓ darunavir
↔ saquinavir
| Appropriate doses of the combination have not been established. Hence, it is not recommended to co-administer saquinavir and PREZISTA, with or without ritonavir. |
| Other HIV protease inhibitors, except atazanavir
[see
Drug Interactions(7.4)]
| | As coadministration with PREZISTA/ritonavir has not been studied, coadministration is not recommended. |
| HIV-1-Antiviral Agents: CCR5 co-receptor antagonists |
| maraviroc | ↑ maraviroc | When used in combination with PREZISTA/ritonavir, the dose of maraviroc should be 150 mg twice daily. |
| Other Agents |
| Antiarrhythmics:
| | For contraindicated antiarrhythmics,
[see
Contraindications (4)]
.
|
| e.g. amiodarone, bepridil, disopyramide, flecainide, lidocaine (systemic), mexiletine, propafenone, quinidine | ↑ antiarrhythmics | Therapeutic concentration monitoring, if available, is recommended for antiarrhythmics when co-administered with PREZISTA/ritonavir. |
| digoxin | ↑ digoxin | The lowest dose of digoxin should initially be prescribed. The serum digoxin concentrations should be monitored and used for titration of digoxin dose to obtain the desired clinical effect. |
Antibacterial:
clarithromycin
| ↔ darunavir
↑ clarithromycin
| No dose adjustment of the combination is required for patients with normal renal function. For co-administration of clarithromycin and PREZISTA/ritonavir in patients with renal impairment, the following dose adjustments should be considered:
- For subjects with CLcr of 30–60 mL/min, the dose of clarithromycin should be reduced by 50%.
- For subjects with CLcr of <30 mL/min, the dose of clarithromycin should be reduced by 75%.
|
Anticoagulants:
apixaban
| ↑ anticoagulant | Concomitant use of apixaban and PREZISTA/ritonavir is not recommended. |
| dabigatran etexilate | | The combination of PREZISTA/ritonavir and dabigatran etexilate is not recommended in specific renal impairment groups, depending on the indication. Please see the dabigatran US prescribing information for specific recommendations. |
| rivaroxaban | | Co-administration of PREZISTA/ritonavir and rivaroxaban is not recommended. |
| warfarin | ↓ warfarin
↔ darunavir
| Warfarin concentrations are decreased when co-administered with PREZISTA/ritonavir. It is recommended that the international normalized ratio (INR) be monitored when warfarin is combined with PREZISTA/ritonavir. |
Anticonvulsants:
carbamazepine
| ↔ darunavir
↑ carbamazepine
| The dose of either PREZISTA/ritonavir or carbamazepine does not need to be adjusted when initiating co-administration with PREZISTA/ritonavir and carbamazepine. Clinical monitoring of carbamazepine concentrations and its dose titration is recommended to achieve the desired clinical response. |
| clonazepam | ↑ clonazepam | Clinical monitoring of anticonvulsants that are metabolized by CYP3A is recommended. |
| phenobarbital, phenytoin | ↔ darunavir
↓ phenytoin
↓ phenobarbital
| Phenytoin and phenobarbital levels should be monitored when co-administering with PREZISTA/ritonavir. |
Antidepressants:
Selective Serotonin Reuptake Inhibitors (SSRIs): paroxetine, sertraline
| ↓ paroxetine
↓ sertraline
| If either sertraline or paroxetine is initiated in patients receiving PREZISTA/ritonavir, dose titrating the SSRI based on a clinical assessment of antidepressant response is recommended. Monitor for antidepressant response in patients on a stable dose of sertraline or paroxetine who start treatment with PREZISTA/ritonavir. |
Tricyclic Antidepressants (TCAs): amitriptyline, desipramine, imipramine, nortriptyline
| ↑ amitriptyline
↑ desipramine
↑ imipramine
↑ nortriptyline
| Use a lower dose of the tricyclic antidepressants and trazodone due to potential increased adverse events such as nausea, dizziness, hypotension and syncope. |
| Other: trazodone
| ↑ trazodone | |
Antifungals:
itraconazole, ketoconazole, posaconazole
| ↑ darunavir
↑ itraconazole
↑ ketoconazole
↔ posaconazole
| Monitor for increased PREZISTA/ritonavir adverse events with concomitant use of itraconazole, ketoconazole, or posaconazole. When co-administration is required, the daily dose of ketoconazole or itraconazole should not exceed 200 mg with monitoring for increased antifungal adverse events. |
| voriconazole | ↓ voriconazole | Voriconazole is not recommended for patients receiving PREZISTA/ritonavir unless an assessment comparing predicted benefit to risk ratio justifies the use of voriconazole. |
Anti-gout:
colchicine
| ↑ colchicine | The coadministration of PREZISTA/ritonavir with colchicine in patients with renal or hepatic impairment is contraindicated
[see
Contraindications (4)]
.
For patients without renal or hepatic impairment: - Treatment of gout-flares – co-administration of colchicine in patients on PREZISTA/ritonavir:
0.6 mg (1 tablet)
× 1 dose, followed by 0.3 mg (half tablet) 1 hour later. Treatment course to be repeated no earlier than 3 days.
- Prophylaxis of gout-flares – co-administration of colchicine in patients on PREZISTA/ritonavir:
If the original regimen was 0.6 mg twice a day, the regimen should be adjusted to 0.3 mg once a day.
If the original regimen was 0.6 mg once a day, the regimen should be adjusted to 0.3 mg once every other day.
- Treatment of familial Mediterranean fever – co-administration of colchicine in patients on PREZISTA/ritonavir:
maximum daily dose of 0.6 mg (may be given as 0.3 mg twice a day).
|
Antimalarial:
artemether/lumefantrine
| ↓ artemether
↓ dihydroartemisinin
↑ lumefantrine
↔ darunavir
| The combination of PREZISTA/ritonavir and artemether/lumefantrine can be used without dose adjustments. However, the combination should be used with caution as increased lumefantrine exposure may increase the risk of QT prolongation. |
| Antimycobacterials:
| | For contraindicated antimycobacterials,
[see
Contraindications (4)].
|
rifabutin
(The reference regimen for rifabutin was 300 mg once daily.)
| ↑ darunavir
↑ rifabutin
↑ 25-
O-desacetylrifabutin
| Dose reduction of rifabutin by at least 75% of the usual dose (300 mg once daily) is recommended (i.e., a maximum dose of 150 mg every other day). Increased monitoring for adverse events is warranted in patients receiving this combination and further dose reduction of rifabutin may be necessary. |
| rifapentine | ↓ darunavir | Co-administration of PREZISTA/ritonavir with rifapentine is not recommended. |
Antineoplastics: dasatinib, nilotinib
| ↑ antineoplastics | A decrease in the dosage or an adjustment of the dosing interval of dasatinib and nilotinib may be necessary for patients. Please refer to the dasatinib and nilotinib prescribing information for dosing instructions. |
| vinblastine, vincristine | | For vincristine and vinblastine, consideration should be given to temporarily withholding the ritonavir-containing antiretroviral regimen in patients who develop significant hematologic or gastrointestinal side effects when PREZISTA/ritonavir is administered concurrently with vincristine or vinblastine. If the antiretroviral regimen must be withheld for a prolonged period, consideration should be given to initiating a revised regimen that does not include a CYP3A or P-gp inhibitor. |
| Antipsychotics:
| | For contraindicated antipsychotics,
[see
Contraindications (4)].
|
| quetiapine | ↑ quetiapine | Initiation of PREZISTA with ritonavir in patients taking quetiapine: Consider alternative antiretroviral therapy to avoid increases in quetiapine exposures. If co-administration is necessary, reduce the quetiapine dose to 1/6 of the current dose and monitor for quetiapine-associated adverse reactions. Refer to the quetiapine prescribing information for recommendations on adverse reaction monitoring.
Initiation of quetiapine in patients taking PREZISTA with ritonavir: Refer to the quetiapine prescribing information for initial dosing and titration of quetiapine.
|
| e.g. perphenazine, risperidone, thioridazine | ↑ antipsychotics | A decrease in the dose of antipsychotics that are metabolized by CYP3A or CYP2D6 may be needed when co-administered with PREZISTA/ritonavir. |
β-Blockers:
e.g. carvedilol, metoprolol, timolol
| ↑ beta-blockers | Clinical monitoring of patients is recommended. A dose decrease may be needed for these drugs when co-administered with PREZISTA/ritonavir and a lower dose of the beta blocker should be considered. |
Calcium Channel Blockers:
amlodipine, diltiazem, felodipine, nicardipine, nifedipine, verapamil
| ↑ calcium channel blockers | Clinical monitoring of patients is recommended. |
Systemic/Inhaled/ Nasal/Ophthalmic Corticosteroids:
e.g.
betamethasone
budesonide
ciclesonide
dexamethasone
fluticasone
methylprednisolone
mometasone
prednisone
triamcinolone
| ↓ darunavir
↑ corticosteroids
| Co-administration of PREZISTA/ritonavir with systemic dexamethasone or other systemic corticosteroids that induce CYP3A may result in loss of therapeutic effect and development of resistance to darunavir. Consider alternative corticosteroids.
Co-administration with corticosteroids of which exposures are significantly increased by strong CYP3A inhibitors can increase the risk for Cushing's syndrome and adrenal suppression.
Alternative corticosteroids including beclomethasone and prednisolone (for which PK and/or PD are less affected by strong CYP3A inhibitors relative to other steroids) should be considered, particularly for long term use.
|
Endothelin receptor antagonist:
bosentan
| ↑ bosentan | Co-administration of bosentan in patients on PREZISTA/ritonavir: In patients who have been receiving PREZISTA/ritonavir for at least 10 days, start bosentan at 62.5 mg once daily or every other day based upon individual tolerability.
Co-administration of PREZISTA/ritonavir in patients on bosentan: Discontinue use of bosentan at least 36 hours prior to initiation of PREZISTA/ritonavir. After at least 10 days following the initiation of PREZISTA/ritonavir, resume bosentan at 62.5 mg once daily or every other day based upon individual tolerability.
|
Hepatitis C virus (HCV): Direct-Acting Antivirals: | | For contraindicated HCV Direct-Acting Antivirals,
[see
Contraindications (4)]
.
|
| simeprevir | ↑ simeprevir
↑ darunavir
| Co-administration of PREZISTA/ritonavir and simeprevir is not recommended |
| HMG-CoA reductase inhibitors:
| | For contraindicated HMG-CoA reductase inhibitors,
[see
Contraindications (4)].
|
| atorvastatin, pravastatin, rosuvastatin | ↑ HMG-CoA reductase inhibitors | Co-administration of PREZISTA/ritonavir with HMG-Co A reductase inhibitors may lead to adverse events such as myopathy. Titrate atorvastatin, pravastatin or rosuvastatin dose carefully and use the lowest necessary dose while monitoring for adverse events. Do not exceed atorvastatin 20 mg/day. |
Immunosuppressants:
e.g. cyclosporine, tacrolimus, sirolimus
| ↑ immunosuppressants | Therapeutic concentration monitoring of the immunosuppressive agent is recommended when co-administered with PREZISTA/ritonavir. |
Immunosuppressant/neoplastic: everolimus
| | Co-administration of everolimus and PREZISTA/ritonavir is not recommended. |
Inhaled beta agonist:
salmeterol
| ↑ salmeterol | Co-administration of salmeterol and PREZISTA/ritonavir is not recommended. The combination may result in increased risk of cardiovascular adverse events associated with salmeterol, including QT prolongation, palpitations and sinus tachycardia. |
Narcotic analgesics metabolized by CYP3A:
e.g. fentanyl, oxycodone
| ↑ fentanyl
↑ oxycodone
| Careful monitoring of therapeutic effects and adverse reactions associated with CYP3A-metabolized narcotic analgesics (including potentially fatal respiratory depression) is recommended with co-administration. |
| tramadol | ↑ tramadol | A dose decrease may be needed for tramadol with concomitant use. |
Narcotic analgesics/treatment of opioid dependence:
buprenorphine, buprenorphine/naloxone
| ↔ buprenorphine, naloxone
↑ norbuprenorphine (metabolite)
| No dose adjustment for buprenorphine or buprenorphine/naloxone is required with concurrent administration of PREZISTA/ritonavir. Clinical monitoring is recommended if PREZISTA/ritonavir and buprenorphine or buprenorphine/naloxone are coadministered. |
| methadone | ↓ methadone | No adjustment of methadone dosage is required when initiating co-administration of PREZISTA/ritonavir. However, clinical monitoring is recommended as the dose of methadone during maintenance therapy may need to be adjusted in some patients. |
Oral contraceptives/estrogen:
ethinyl estradiol, norethindrone
| ↓ ethinyl estradiol
↓ norethindrone
| Effective alternative contraceptive method or barrier method of contraception is recommended
[see
Use in Specific Populations (8.3)]
.
|
PDE-5 inhibitors:
e.g. avanafil, sildenafil, tadalafil, vardenafil
| ↑ PDE-5 inhibitors (only the use of sildenafil at doses used for treatment of erectile dysfunction has been studied with PREZISTA/ritonavir) | Co-administration with PREZISTA/ritonavir may result in an increase in PDE-5 inhibitor-associated adverse events, including hypotension, syncope, visual disturbances and priapism. Use of PDE-5 inhibitors for pulmonary arterial hypertension (PAH): Co-administration of PREZISTA/ritonavir and sildenafil for treatment of pulmonary arterial hypertension is contraindicated
[see
Contraindications (4)]
.
The following dose adjustments are recommended for use of tadalafil with PREZISTA/ritonavir: - Co-administration of tadalafil in patients on PREZISTA/ritonavir:
In patients receiving PREZISTA/ritonavir for at least one week, start tadalafil at 20 mg once daily. Increase to 40 mg once daily based upon individual tolerability.
- Co-administration of PREZISTA/ritonavir in patients on tadalafil:
Avoid use of tadalafil during the initiation of PREZISTA/ritonavir. Stop tadalafil at least 24 hours prior to starting PREZISTA/ritonavir. After at least one week following the initiation of PREZISTA/ritonavir, resume tadalafil at 20 mg once daily. Increase to 40 mg once daily based upon individual tolerability.
Use of PDE-5 inhibitors for erectile dysfunction: Sildenafil at a single dose not exceeding 25 mg in 48 hours, vardenafil at a single dose not exceeding 2.5 mg dose in 72 hours, or tadalafil at a single dose not exceeding 10 mg dose in 72 hours can be used with increased monitoring for PDE-5 inhibitor-associated adverse events.
Co-administration of PREZISTA/ritonavir and avanafil is not recommended. |
Platelet aggregation inhibitor:
ticagrelor
| ↑ ticagrelor | Co-administration of PREZISTA/ritonavir and ticagrelor is not recommended. |
Proton pump inhibitor: omeprazole
| ↓ omeprazole
↔ darunavir
| When omeprazole is co-administered with PREZISTA/ritonavir, monitor patients for decreased efficacy of omeprazole. Consider increasing the omeprazole dose in patients whose symptoms are not well controlled; avoid use of more than 40 mg per day of omeprazole. |
| Sedatives/hypnotics: | | For contraindicated sedatives/hypnotics,
[see
Contraindications (4)]
.
|
metabolized by CYP3A
e.g. buspirone, diazepam, estazolam, zolpidem
| ↑ sedatives/hypnotics | Titration is recommended when co-administering PREZISTA/ritonavir with sedatives/hypnotics metabolized by CYP3A and a lower dose of the sedatives/hypnotics should be considered with monitoring for adverse events. |
| parenterally administered midazolam | | Co-administration of parenteral midazolam should be done in a setting which ensures close clinical monitoring and appropriate medical management in case of respiratory depression and/or prolonged sedation. Dosage reduction for midazolam should be considered, especially if more than a single dose of midazolam is administered. |