It is very important that your doctor check the progress of you or your child at regular visits to make sure this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Do not use this medicine if you or your child are also using alfuzosin (Uroxatral®), cisapride (Propulsid®), delavirdine (Rescriptor®), flecainide (Tambocor®), lovastatin (Altocor®, Mevacor®), oral midazolam (Versed®), pimozide (Orap®), propafenone (Rythmol®), rifampin (Rifadin®, Rimactane®), sildenafil (Revatio®), simvastatin (Simcor®, Vytorin®, Zocor®), triazolam (Halcion®), or ergot medicines (e.g., dihydroergotamine, ergonovine, ergotamine, methylergonovine, Cafergot®, D.H.E. 45®, Ergomar®, Ergostat®, Ergotrate®, Methergine®, Migranal®, or Wigraine®).
Do not take other medicines unless they have been discussed with your doctor. This includes prescription and nonprescription (over-the-counter [OTC]) medicines, and herbal (e.g., St. John's wort) or vitamin supplements.
When you start taking HIV medicines, your immune system may get stronger. If you have infections that are hidden in your body, such as pneumonia or tuberculosis, you or your child may notice new symptoms when your body tries to fight them. If this occurs, tell your doctor immediately.
Tell your doctor if you are also taking sildenafil (Viagra®), tadalafil (Cialis®), or vardenafil (Levitra®). Taking these medicines together with fosamprenavir may increase your risk of having side effects such as low blood pressure, changes in vision, or prolonged erection of the penis.
Birth control pills may not work as well while you are using fosamprenavir. To keep from getting pregnant, use an additional form of birth control along with your pills. Other forms of birth control include condoms, diaphragms, or contraceptive foams or jellies.
This medicine may increase blood sugar levels. Check with your doctor if you or your child notice a change in the results of your blood or urine sugar tests.
Serious skin reactions can occur with this medicine. Stop using this medicine and check with your doctor right away if you or your child have blistering, peeling, or loosening of the skin; itching; white spots in the mouth or on the lips; or redness of the skin.
This medicine may cause you to have excess body fat. Tell your doctor if you or your child notice changes in your body shape, such as an increased amount of fat in the upper back and neck, or around the chest and stomach area. You might also lose fat from the legs, arms, and face.
This medicine may increase your cholesterol and fats in the blood. If this condition occurs, your doctor may give you or your child some medicines that can lower the amount of cholesterol and fats in the blood.
This medicine may increase your risk of having kidney stones. Check with your doctor right away and stop using this medicine if you or your child have blood in your urine, nausea and vomiting, pain in the groin or genitals, or sharp back pain just below the ribs.
Fosamprenavir does not decrease the risk of transmitting the HIV infection to others through sexual contact or by contamination through blood. HIV may be acquired from or spread to others through infected body fluids, including blood, vaginal fluid, or semen. If you are infected, it is best to avoid any sexual activity involving an exchange of body fluids with other people. If you do have sex, always wear (or have your partner wear) a condom (“rubber”). Only use condoms made of latex, and use them every time you have vaginal, anal, or oral sex. The use of a spermicide (such as nonoxynol-9) may also help prevent the spread of HIV if it is not irritating to the vagina, rectum, or mouth. Spermicides have been shown to kill HIV in lab tests. Do not use oil-based jelly, cold cream, baby oil, or shortening as a lubricant—these products can cause the condom to break. Lubricants without oil, such as K-Y Jelly, are recommended. Women may wish to carry their own condoms. Birth control pills and diaphragms will help protect against pregnancy, but they will not prevent someone from giving or getting the AIDS virus. If you inject drugs, get help to stop. Do not share needles or equipment with anyone. In some cities, more than half of the drug users are infected, and sharing even 1 needle or syringe can spread the virus. If you have any questions about this, check with your doctor.
Tell the doctor in charge that you or your child are taking this medicine before you have any medical tests. The results of some tests may be affected by this medicine.