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 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.
Do not use this medicine if you or your child are also using alfuzosin (Uroxatral®), amiodarone (Cordarone®), astemizole (Hismanal®), bepridil (Vascor®), cisapride (Propulsid®), ergot medicines (e.g., dihydroergotamine, ergonovine, ergotamine, methylergonovine, Cafergot®, or Ergomar®), flecainide (Tambocor®), lovastatin (Altocor®, Mevacor®), oral midazolam (Versed®), pimozide (Orap®), propafenone (Rythmol®), quinidine (Quinaglute®), sildenafil (Revatio®), simvastatin (Simcor®, Vytorin®, Zocor®), terfenadine (Seldane®), triazolam (Halcion®), or voriconazole (Vfend®). Using these medicines together with ritonavir may increase your chance of having serious side effects.
Check with your doctor right away if you or your child have pain or tenderness in the upper stomach; pale stools; dark urine; loss of appetite; nausea; unusual tiredness or weakness; or yellow eyes or skin. These could be symptoms of a serious liver problem.
Pancreatitis may occur while you are using this medicine. Stop using this medicine and check with your doctor right away if you or your child have sudden and severe stomach pain, chills, constipation, nausea, vomiting, fever, or lightheadedness.
This medicine may decrease the effects of some birth control pills. To avoid 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.
Serious skin reactions can occur with this medicine. Check with your doctor right away if you or your child have any of the following symptoms while taking this medicine: blistering, peeling, or loosening of the skin; fever; chills; cough; diarrhea; itching; joint or muscle pain; rash; red skin lesions, often with a purple center; sore throat; sores, ulcers, or white spots in the mouth or on the lips; swelling of your hands, face, tongue, or throat; or unusual tiredness or weakness.
This medicine may increase the level of cholesterol and fats in your blood. If this condition occurs, your doctor may give you a medicine to lower the cholesterol and fats. Talk to your doctor if you or your child have concerns.
This medicine will not keep you from giving HIV to your partner during sex. Make sure you understand this and practice safe sex, even if your partner also has HIV, by using a latex condom or other barrier method. This medicine will also not keep you from giving HIV to other people if they are exposed to your blood. Do not re-use or share needles with anyone.
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 may notice new symptoms when your body tries to fight them. If this occurs, be sure to tell your doctor.
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.