fosamprenavir

What is the most important information I should know about fosamprenavir?

Tell your doctor about all your current medicines and any you start or stop using. Many drugs can interact, and some drugs should not be used together.

What is fosamprenavir?

Fosamprenavir is an antiviral medicine that prevents human immunodeficiency virus (HIV) from multiplying in your body.

Fosamprenavir is used to treat HIV, the virus that can cause acquired immunodeficiency syndrome (AIDS). Fosamprenavir is for use in adults and children who are at least 4 weeks old. This medicine is not a cure for HIV or AIDS.

Fosamprenavir may also be used for purposes not listed in this medication guide.

What should I discuss with my healthcare provider before taking fosamprenavir?

• alfuzosin;
• delavirdine;
• rifampin;
• St. John's wort;
• sildenafil (Revatio) when used to treat pulmonary arterial hypertension (PAH);
• antipsychotic medicine --lurasidone, pimozide;
• cholesterol-lowering medicine --lovastatin, simvastatin;
• ergot medicine --dihydroergotamine, ergotamine, ergonovine, methylergonovine;
• heart rhythm medicine --flecainide, propafenone; or
• a sedative --oral midazolam or triazolam.

Tell your doctor if you have ever had:

• liver disease, including hepatitis B or C;
• kidney disease;
• a bleeding disorder such as hemophilia;
• diabetes; or
• an allergy to sulfa drugs.

Tell your doctor if you are pregnant, and use your medications properly to control your infection. HIV can be passed to your baby if the virus is not controlled during pregnancy. Your name may be listed on a registry to track any effects of antiviral medicine on the baby.

Fosamprenavir should not be given to an infant younger than 4 weeks (28 days) old.

How should I take fosamprenavir?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Fosamprenavir tablets can be taken with or without food.

Fosamprenavir liquid should be taken with food in children and without food in adults.

Fosamprenavir doses are based on weight in children. Your child's dose needs may change if the child gains or loses weight.

You will need frequent medical tests.

Use all HIV medications as directed and read all medication guides you receive. Do not change your dose or dosing schedule without your doctor's advice. Every person with HIV should remain under the care of a doctor.

What happens if I miss a dose?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

Get your prescription refilled before you run out of medicine completely.

What happens if I overdose?

What should I avoid while taking fosamprenavir?

Using this medicine will not prevent your disease from spreading. Do not have unprotected sex or share razors or toothbrushes. Talk with your doctor about safe ways to prevent HIV transmission during sex. Sharing drug or medicine needles is never safe, even for a healthy person.

What are the possible side effects of fosamprenavir?

• pale or yellowed skin, dark colored urine, fever, confusion or weakness;
• increased urination or extreme thirst; or
• high blood sugar --increased thirst, increased urination, dry mouth, fruity breath odor; or
• symptoms of kidney stones --sudden and severe pain in your lower back or side, blood in your urine, pain or burning when you urinate.

Fosamprenavir affects your immune system, which may cause certain side effects (even weeks or months after you've taken this medicine). Tell your doctor if you have:

• signs of a new infection --fever, night sweats, swollen glands, cold sores, cough, wheezing, diarrhea, weight loss;
• trouble speaking or swallowing, problems with balance or eye movement, weakness or prickly feeling; or
• swelling in your neck or throat (enlarged thyroid), menstrual changes, impotence.

Common side effects of fosamprenavir may include:

• fever or other signs of infection;
• nausea, vomiting, diarrhea;
• rash;
• headache; 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. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect fosamprenavir?

Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.

Many drugs can affect fosamprenavir, and some drugs should not be used at the same time. Tell your doctor about all your current medicines and any medicine you start or stop using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.

Where can I get more information?

Your pharmacist can provide more information about fosamprenavir.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2023 Cerner Multum, Inc. Version: 12.01. Revision date: 9/5/2018.