Ombitasvir, Paritaprevir, Ritonavir, and Dasabuvirpronounced as (om bit' as vir) (par'' I ta' pre vir) (ri toe' na vir) (da sa' bue vir)
You may already be infected with hepatitis B (a virus that infects the liver and may cause severe liver damage) but not have any symptoms of the disease. In this case, taking the combination of ombitasvir, paritaprevir, ritonavir, and dasabuvir may increase the risk that your infection will become more serious or life-threatening and you will develop symptoms. Tell your doctor if you have or ever had a hepatitis B virus infection. Your doctor will order a blood test to see if you have or have ever had hepatitis B infection. Your doctor will also monitor you for signs of hepatitis B infection during and for several months after your treatment. If necessary, your doctor may give you medication to treat this infection before and during your treatment with the combination of ombitasvir, paritaprevir, ritonavir, and dasabuvir. If you experience any of the following symptoms during or after your treatment, call your doctor immediately: excessive tiredness, yellowing of the skin or eyes, loss of appetite, nausea or vomiting, pale stools, stomach pain, or dark urine.
Keep all appointments with your doctor and the laboratory. Your doctor may order certain tests before, during, and after your treatment to check your body's response to the combination of ombitasvir, paritaprevir, ritonavir, and dasabuvir.
Talk to your doctor about the risk(s) of taking the combination of ombitasvir, paritaprevir, ritonavir, and dasabuvir.
Why is this medication prescribed?
The combination of ombitasvir, paritaprevir, ritonavir, and dasabuvir is used alone or in combination with ribavirin (Copegus, Rebetol) to treat chronic (long-term) hepatitis C infection (swelling of the liver caused by a virus). Ombitasvir is a hepatitis C virus (HCV) NS5A inhibitor. It works by stopping the virus that causes hepatitis C from spreading inside the body. Paritaprevir is a protease inhibitor. It works by decreasing the amount of HCV in the body. Ritonavir is a protease inhibitor. It helps to increase the amount of paritaprevir in the body so that the medication will have a greater effect. Dasabuvir is a non-nucleoside NS5B polymerase inhibitor. It works by decreasing the amount of HCV in the body. It is not known if ombitasvir, paritaprevir, ritonavir, or dasabuvir prevent the spread of hepatitis C to other people.
How should this medicine be used?
The combination of ombitasvir, paritaprevir, ritonavir, and dasabuvir comes as tablets to take by mouth. This medication comes in a package with 28 days of medication. Each daily dose package has different types of tablets, two containing the combination of ombitasvir, paritaprevir, and ritonavir and two others containing dasabuvir. Take ombitasvir, paritaprevir, and ritonavir (2 tablets) and dasabuvir (1 tablet) every morning with food, then take dasabuvir (1 tablet) every evening with food. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take ombitasvir, paritaprevir, ritonavir, and dasabuvir at around the same time(s) every day. Do not take more or less of it or take it more often than prescribed by your doctor.
The combination of ombitasvir, paritaprevir, ritonavir, and dasabuvir controls HCV but does not cure it. Continue to take ombitasvir, paritaprevir, ritonavir, and dasabuvir even if you feel well. The length of your treatment (12 to 24 weeks) depends on your condition, how well you respond to the medication, and whether you experience severe side effects. Do not stop taking ombitasvir, paritaprevir, ritonavir, and dasabuvir without talking to your doctor.
Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient.
Other uses for this medicine
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
What special precautions should I follow?
Before taking ombitasvir, paritaprevir, ritonavir, and dasabuvir,
- tell your doctor and pharmacist if you are allergic (rash, blistering or peeling of the skin) to ombitasvir, paritaprevir, ritonavir, dasabuvir, any other medications, or any of the ingredients in ombitasvir, paritaprevir, ritonavir, and dasabuvir tablets. Ask your pharmacist or check the Medication Guide for a list of the ingredients.
- tell your doctor if you are taking alfuzosin (Uroxatral), carbamazepine (Carbatrol, Epitol, Equetro, Tegretol), ; efavirenz (Sustiva); ergot-containing medicines such as dihydroergotamine mesylate (D.H.E. 45, Migranal), ergotamine (Ergomar, in Cafergot, in Migergot), and methylergonovine (Methergine); ethinyl estradiol oral contraceptives such as certain ('birth control pills'), patches, hormonal vaginal rings, and other esthinyl estradiol products; gemfibrozil (Lopid); lovastatin (Altoprev, in Advicor); midazolam (by mouth); phenobarbital; phenytoin (Dilantin, Phenytek); pimozide (Orap); rifampin (Rifadin, Rimactane, in Rifamate, in Rifater); sildenafil (Revatio) for treatment of pulmonary arterial hypertension; simvastatin (Zocor, in Simcor, in Vytorin); St. John's wort; or triazolam (Halcion). Your doctor will probably tell you not to take ombitasvir, paritaprevir, ritonavir, and dasabuvir if you are taking one or more of these medications.
- tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: alprazolam (Xanax); amlodipine (Norvasc, in Amturnide, in Tekamlo);buprenorphine and naloxone (Suboxone, Zubsolv); fluticasone (Flonase, Flovent, in Advair); furosemide (Lasix); immunosuppressants such as cyclosporine (Gengraf, Neoral, Sandimmune) or tacrolimus (Astagraf XL, Prograf, Protopic); ketoconazole (Nizoral, Xolegel); medications for irregular heartbeat such as amiodarone (Cordarone, Nexterone, Pacerone), bepridil (no longer available in the U.S.), disopyramide (Norpace), flecainide, lidocaine (Xylocaine), mexiletine, propafenone (Rythmol), or quinidine (in Nuedexta); omeprazole (Prilosec); pravastatin (Pravachol); quetiapine (Seroquel); rilpivirine (Edurant; in Complera); ritonavir (Norvir, in Kaletra) used in combination with other HIV protease inhibitors such as atazanavir (Reyataz), darunavir (Prezista), and lopinavir (in Kaletra); rosuvastatin (Crestor); salmeterol (Serevent, in Advair); and voriconazole (Vfend). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
- tell your doctor if you have any type of liver disease other than hepatitis C. Your doctor may tell you not to take ombitasvir, paritaprevir, ritonavir, and dasabuvir.
- tell your doctor if you have ever had a liver transplant, anemia (a lower than normal number of red blood cells), or human immunodeficiency virus (HIV).
- tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while taking ombitasvir, paritaprevir, ritonavir, and dasabuvir, call your doctor.
- you should know that ombitasvir, paritaprevir, ritonavir, and dasabuvir may decrease the effectiveness of hormonal contraceptives (birth control pills, patches, rings, implants, injections, and intrauterine devices). Use another form of birth control while you are taking ombitasvir, paritaprevir, ritonavir, and dasabuvir and for 2 weeks after you stop taking it. Talk to your doctor about types of birth control that will work for you during and after your treatment with ombitasvir, paritaprevir, ritonavir, and dasabuvir.
What special dietary instructions should I follow?
Unless your doctor tells you otherwise, continue your normal diet.
What should I do if I forget a dose?
If you miss a dose of ombitasvir, paritaprevir, and ritonavir, take the missed dose with a meal as soon as you remember it. However, if it is more than 12 hours since the time you should have taken your dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
If you miss a dose of dasabuvir, take the missed dose with a meal as soon as you remember it. However, if it is more than 6 hours since the time you should have taken your dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
What side effects can this medication cause?
Ombitasvir, paritaprevir, ritonavir, and dasabuvir may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- difficulty falling asleep or staying asleep
Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately:
- reddening of the skin
Ombitasvir, paritaprevir, ritonavir, and dasabuvir may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).
What should I know about storage and disposal of this medication?
Keep this medication in the carton it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom).
Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them. However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. Talk to your pharmacist or contact your local garbage/recycling department to learn about take-back programs in your community. See the FDA's Safe Disposal of Medicines website (http://goo.gl/c4Rm4p) for more information if you do not have access to a take-back program.
In case of emergency/overdose
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
What other information should I know?
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.
Brand names of combination products
- Viekira Pak® (as a combination product containing Ombitasvir, Paritaprevir, Ritonavir, Dasabuvir)