NORVIR ORAL POWDER Dosage & Rx Info

Norvir Oral Powder Generic Name & Formulations

Legal Class

General Description

Ritonavir 100mg; per pkt.

Pharmacological Class

HIV-1 protease inhibitor.

How Supplied

Tabs—30; Soln—240mL; Pwd—30 packets

Manufacturer

AbbVie

Generic Availability

Norvir Oral Powder Indications

Indications

HIV-1 infection, in combination with other antiretroviral agents.

Norvir Oral Powder Dosage and Administration

Adult

Not applicable.

Children

<1month: not recommended. Use only for dosing increments of 100mg; if less than or between 100mg intervals, use oral soln. Mix with soft foods (eg, apple sauce, vanilla pudding) or liquids (eg, water, chocolate milk, infant formula). May be given via feeding tube after mixing with water. >1month: initially 250mg/m² twice daily, increase every 2‒3 days by 50mg/m² twice daily to 350‒400mg/m² twice daily; max 600mg twice daily. Consider alternative therapy if 400mg/m² twice daily is not tolerated. Concomitant other PIs (eg, atazanavir, darunavir, fosamprenavir, saquinavir, tipranavir); reduce ritonavir dose. See full labeling.

Norvir Oral Powder Contraindications

Contraindications

Concomitant alfuzosin HCl, ranolazine, amiodarone, dronedarone, flecainide, quinidine, propafenone, voriconazole (w. ritonavir ≥400mg every 12hrs), colchicine (in renal and/or hepatic impairment), lurasidone, pimozide, ergots, cisapride, lomitapide, lovastatin, simvastatin, sildenafil (as Revatio for PAH), oral midazolam, triazolam, apalutamide, St. John's Wort.

Norvir Oral Powder Boxed Warnings

Boxed Warning

Drug-drug interactions leading to potentially serious and/or life-threatening reactions.

Norvir Oral Powder Warnings/Precautions

Warnings/Precautions

Potentially life-threatening drug-drug interactions (see Contraindications). Pre-existing liver disease, liver enzyme abnormalities, or hepatitis; consider monitoring ALT/AST, GGT (esp. during first 3 months of therapy). Severe hepatic impairment: not recommended. Discontinue if pancreatitis or severe hypersensitivity occurs. Increased risk of cardiac conduction abnormalities in patients with ischemic heart or underlying structural heart disease, pre-existing conduction abnormalities, cardiomyopathies. Monitor blood, CPK, uric acid, triglycerides, and cholesterol prior to initiation and periodically during therapy. Monitor for hyperglycemia and new onset/exacerbation of diabetes. Monitor for increased bleeding in hemophilia. Oral soln: avoid with polyurethane feeding tubes. Toxicity in preterm neonates (see full labeling). Elderly. Pregnancy. Nursing mothers: not recommended.

Norvir Oral Powder Pharmacokinetics

See Literature

Norvir Oral Powder Interactions

Interactions

See Contraindications. Concomitant glecaprevir/pibrentasvir, simeprevir, salmeterol, high-dose or long-term meperidine, ketoconazole or itraconazole >200mg/day, elagolix 400mg/day for >1 month: not recommended. May affect or be affected by CYP3A, 2D6, 2C9, 1A2, 2C19, 2B6, or glucuronyl transferase substrates. Potentiates other protease inhibitors, maraviroc, tramadol, propoxyphene, antidepressants (eg, SSRIs, tricyclics, nefazodone, desipramine, trazodone), dronabinol, quinine, bosentan, β-blockers (eg, metoprolol, timolol), CCBs (eg, diltiazem, nifedipine, verapamil), PDE-5 inhibitors (eg, avanafil, sildenafil, tadalafil, vardenafil), antipsychotics (eg, perphenazine, risperidone, thioridazine), sedative/hypnotics (eg, buspirone, clorazepate, diazepam, estazolam, flurazepam, zolpidem), statins (eg, atorvastatin, rosuvastatin), methamphetamine; may need dose reductions. Potentiates anticancer agents (eg, abemaciclib, dasatinib, encorafenib, ibrutinib, ivosidenib, neratinib, nilotinib, venetoclax, vinblastine, vincristine); avoid or reduce doses (see full labeling). Increases levels of disopyramide, lidocaine, mexiletine, carbamazepine, clonazepam, ethosuximide, digoxin, immunosuppressants, glucocorticoids (eg, dexamethasone, betamethasone, fluticasone, budesonide, prednisone; consider alternatives); monitor. Antagonizes raltegravir, divalproex, lamotrigine, phenytoin, bupropion, atovaquone, theophylline (monitor), methadone (consider dose increase), oral contraceptives (consider alternatives). Antagonized by rifampin. Potentiated by delavirdine. Avoid metronidazole, disulfiram, rivaroxaban (increased bleeding risk). Reduce rifabutin dose by at least ¾, quetiapine to ⅙ of current dose, clarithromycin dose in renal dysfunction. Concomitant bedaquiline: use only if benefit outweighs the risk. Monitor fentanyl, parenteral midazolam, warfarin. See full labeling.

Norvir Oral Powder Adverse Reactions

Adverse Reactions

Diarrhea, nausea, vomiting, abdominal pain, paresthesias, fatigue/asthenia, rash (may be serious), cough; hepatotoxicity, pancreatitis, immune reconstitution syndrome, lipid disorders, fat redistribution, hyperglycemia, anaphylaxis, PR interval prolongation.

Norvir Oral Powder

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