Drugs A - Z

Fosamprenavir Calcium Oral suspension

It is used with other medicines to treat HIV

Generic Name: fosamprenavir

Brand Names: Telzir

What is this medicine?

FOSAMPRENAVIR (FOS am pren a veer) is an antiretroviral medicine. It is used with other medicines to treat HIV. This medicine is not a cure for HIV. It will not stop the spread of HIV to others.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • diabetes
  • hemophilia
  • kidney disease
  • liver disease
  • an unusual or allergic reaction to fosamprenavir, amprenavir, sulfa drugs, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

Take this medicine by mouth. Follow the directions on the prescription label. Shake well before using. Adults should take this medicine without food. Children should take this medicine with food. Use a specially marked spoon or dropper to measure each dose. Ask your pharmacist if you do not have one. Household spoons are not accurate. If you vomit within 30 minutes of taking this medicine take another dose. Take your medicine at regular intervals. Do not take your medicine more often than directed. For your anti-HIV therapy to work as well as possible, take each dose exactly as prescribed. Do not skip doses or stop your medicine even if you feel better. Skipping doses may make the HIV virus resistant to this medicine and other medicines. Do not stop taking except on your doctor's advice.

Talk to your pediatrician regarding the use of this medicine in children. While this drug may be prescribed for children as young as 4 weeks old for selected conditions, precautions do apply.

What if I miss a dose?

If you miss a dose by more than 4 hours, wait and take the next dose at the regular time. But, if you miss a dose by less than 4 hours, take your missed dose right away. Then take your next dose at the regular time. Do not take double or extra doses.

What may interact with this medicine?

Do not take this medicine with any of the following medications:
  • astemizole
  • bepridil
  • cisapride
  • delavirdine
  • dofetilide
  • flecainide
  • female hormones, like estrogens or progestins and birth control pills, patches, rings, or injections
  • medicines for headaches like dihydroergotamine, ergonovine, ergotamine, methylergonovine
  • medicines for high cholesterol like atorvastatin, cerivastatin, lovastatin, rosuvastatin, simvastatin
  • midazolam
  • pimozide
  • propafenone
  • ranolazine
  • red yeast rice
  • rifampin
  • rifapentine
  • triazolam
  • St. John's wort
  • vitamin E supplements

This medicine may also interact with the following medications:

  • amiodarone
  • antacids
  • cyclosporine
  • dexamethasone
  • fluticasone
  • lidocaine
  • medicines for depression, anxiety, or psychotic disturbances
  • medicines for erectile dysfunction
  • medicines for fungal infections like ketoconazole and itraconazole
  • medicines for blood pressure like amlodipine, diltiazem, verapamil
  • medicines for seizures
  • medicines for stomach problems like cimetidine, famotidine, nizatidine, ranitidine
  • methadone
  • other medicines for HIV
  • quinidine
  • rapamycin
  • rifabutin
  • sildenafil
  • sirolimus
  • tacrolimus
  • warfarin


Last Updated: May 03, 2012
Licensed from
The Healthline Site, its content, such as text, graphics, images, search results, HealthMaps, Trust Marks, and other material contained on the Healthline Site ("Content"), its services, and any information or material posted on the Healthline Site by third parties are provided for informational purposes only. None of the foregoing is a substitute for professional medical advice, examination, diagnosis, or treatment. Always seek the advice of a physician or other qualified healthcare provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on the Healthline Site. If you think you may have a medical emergency, call your doctor or 911 immediately. Please read the Terms of Service for more information regarding use of the Healthline Site.
Advertisement