Invirase
Generic Name: saquinavir (sa KWIN a veer)
What is Invirase?
Invirase is an antiviral medication. It is in a group of drugs called protease (PRO-tee-ayz) inhibitors. It prevents human immunodeficiency virus (HIV) cells from multiplying in your body.
Invirase is used to treat HIV, which causes acquired immunodeficiency syndrome (AIDS). This medication is not a cure for HIV or AIDS.
Invirase may also be used for other purposes not listed in this medication guide.
Important information about Invirase
Do not take Invirase with amiodarone (Cordarone, Pacerone), flecainide (Tambocor), propafenone (Rythmol), rifampin (Rifadin, Rimactane, Rifater), quinidine (Cardioquin, Quinaglute, Quinidex), cisapride (Propulsid), pimozide (Orap), midazolam (Versed), triazolam (Halcion), or an ergot medicine such as Ergomar, Cafergot, Wigraine, D.H.E. 45, Migranal or Methergine.
There are many other medicines that can interact with Invirase. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor. Keep a list with you of all the medicines you use and show this list to any doctor or other healthcare provider who treats you.
HIV/AIDS is usually treated with a combination of different drugs. To best treat your condition, use all of your medications as directed by your doctor. Do not change your doses or medication schedule without advice from your doctor. Every person with HIV or AIDS should remain under the care of a doctor.
Taking Invirase will not prevent you from passing HIV to other people through unprotected sex or sharing of needles. Talk with your doctor about safe methods of preventing HIV transmission during sex, such as using a condom and spermicide. Sharing drug or medicine needles is never safe, even for a healthy person.
Before taking Invirase
Do not take this medication if you are allergic to saquinavir.
Do not take Invirase with any of the following medications. They can cause life-threatening side effects if you use them while you are taking Invirase:
amiodarone (Cordarone, Pacerone);
cisapride (Propulsid);
flecainide (Tambocor);
midazolam (Versed) or triazolam (Halcion);
pimozide (Orap);
propafenone (Rythmol);
quinidine (Cardioquin, Quinidex, Quinaglute); or
or ergot medicines such as ergotamine (Ergomar, Cafergot), dihydroergotamine (D.H.E. 45, Migranal Nasal Spray), ergonovine (Ergotrate), or methylergonovine (Methergine).
If you have any of these conditions, you may need a dose adjustment or special tests to safely take Invirase:
diabetes;
a bleeding disorder (hemophilia); or
high cholesterol or triglycerides.
FDA pregnancy category B. This medication is not expected to be harmful to an unborn baby, but HIV can be passed to the baby if the mother is not properly treated during pregnancy. Tell your doctor if you are pregnant or plan to become pregnant during treatment. Take all of your HIV medicines as directed to control your infection while you are pregnant.
Your name may need to be listed on an antiviral pregnancy registry when you start using this medication.
Invirase can make birth control pills less effective. Ask your doctor about using a non-hormone method of birth control (such as a condom, diaphragm, spermicide) to prevent pregnancy while taking Invirase. You should not breast-feed while you are using Invirase. Women with HIV or AIDS should not breast-feed at all. Even if your baby is born without HIV, you may still pass the virus to the baby in your breast milk. Do not give this medication to a child younger than 16 years old without the advice of a doctor.
How should I take Invirase?
Take Invirase exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.
This medication comes with patient instructions for safe and effective use. Follow these directions carefully. Ask your doctor or pharmacist if you have any questions.
Take each dose with a full glass (8 ounces) of water.
Invirase should be taken together with another medication called ritonavir (Norvir).
Take Invirase and ritonavir with food or within 2 hours after eating a full meal.
It is important to use Invirase regularly to get the most benefit. Get your prescription refilled before you run out of medicine completely.
HIV/AIDS is usually treated with a combination of different drugs. To best treat your condition, use all of your medications as directed by your doctor. Be sure to read the medication guide or patient instructions provided with each of your medications. Do not change your doses or medication schedule without advice from your doctor. Every person with HIV or AIDS should remain under the care of a doctor.
To be sure Invirase is helping your condition, your blood will need to be tested on a regular basis. Your liver function may also need to be tested. Do not miss any scheduled appointments.
Store Invirase at room temperature away from moisture and heat.
What happens if I miss a dose?
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention if you think you have used too much of this medicine. Symptoms of a Invirase overdose are not known.
What should I avoid while taking Invirase?
If you also take didanosine, take it 2 hour before or after you take Invirase.
Taking Invirase will not prevent you from passing HIV to other people through unprotected sex or sharing of needles. Talk with your doctor about safe methods of preventing HIV transmission during sex, such as using a condom and spermicide. Sharing drug or medicine needles is never safe, even for a healthy person.
Invirase side effects
Get emergency medical help if you have any of these signs of an allergic reaction to Invirase: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop taking Invirase and call your doctor at once if you have any of these serious side effects:
fever, sore throat, and headache with a severe blistering, peeling, and red skin rash;
increased urination or extreme thirst;
easy bruising or bleeding;
signs of a new infection, such as fever or chills, cough, or flu symptoms; or
nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
Less serious Invirase side effects may include:
mild nausea, vomiting, diarrhea, stomach pain;
numbness or tingling, especially around your mouth;
muscle pain;
headache, mood changes; or
changes in the shape or location of body fat (especially in your arms, legs, face, neck, breasts, and waist).
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect Invirase?
Many drugs can interact with Invirase. Below is just a partial list. Tell your doctor if you are using:
digoxin (digitalis, Lanoxin);
fluticasone (Advair, Flonase, Flovent);
garlic or St. John’s wort;
antibiotics such as clarithromycin (Biaxin), itraconazole (Sporanox), ketoconazole (Nizoral), or rifampin (Rifadin, Rimactane, Rifater);
antidepressants such as amitriptyline (Elavil, Etrafon), imipramine (Janimine, Tofranil), trazodone (Desyrel), and others;
a blood thinner such as warfarin (Coumadin);
a calcium channel blocker such as amlodipine (Caduet, Lotrel, Norvasc), diltiazem (Tiazac, Cartia, Dilacor), felodipine (Plendil), nifedipine (Procardia, Adalat), or verapamil (Calan, Covera, Isoptin, Verelan);
cholesterol-lowering medicine such as atorvastatin (Lipitor), lovastatin (Mevacor, Altocor), or simvastatin (Zocor);
drugs that weaken the immune system, such as cyclosporine (Gengraf, Neoral, Sandimmune), sirolimus (Rapamune), or tacrolimus (Prograf);
other HIV /AIDS medicine such as darunavir (Prezista), lopinavir/ritonavir (Kaletra), or tipranavir (Aptivus);
insulin or diabetes medication you take by mouth;
medicines to treat erectile dysfunction, such as sildenafil (Viagra), tadalafil (Cialis), or vardenafil (Levitra); or
seizure medications such as carbamazepine (Carbatrol, Tegretol), phenobarbital (Luminal, Solfoton), or phenytoin (Dilantin).
This list is not complete and there may be other medicines that can interact with Invirase. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor. Keep a list with you of all the medicines you use and show this list to any doctor or other healthcare provider who treats you.
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