What is this medication for?
Ritonavir is used in combination with other HIV medications to treat the infection caused by the human immunodeficiency virus (HIV). HIV is the virus responsible for acquired immune deficiency syndrome (AIDS). Ritonavir is one of a class of drugs called protease inhibitors (PIs). Protease is an enzyme that is needed by HIV to reproduce. Ritonavir blocks the action of protease.
Ritonavir does not cure AIDS and does not prevent it from being spread to others. It does slow further growth or reproduction of HIV when used in combination with other medications, and it seems to slow down the destruction of the immune system. This may help to delay the development of problems that are related to AIDS or HIV disease.
Your doctor may have suggested this medication for conditions other than those listed here. As well, some forms of this medication may not be used for all of the conditions discussed here. If you are not sure why you are taking this medication, speak to your doctor. Do not stop taking this medication without consulting your doctor.
Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.
Some medications may have other generic brands available. Always ask your doctor or pharmacist about the safety of switching between brands of the same medication.
How should I use this medication?
The recommended adult dose of ritonavir is 600 mg twice daily, with meals if possible. If saquinavir is used in combination, the adult dose of ritonavir is 400 mg taken twice daily. Children's doses are based on body size as calculated by the doctor.
Each doses of ritonavir oral solution should be determined using a measuring spoon or cup. Shake well before you take the liquid form of this medication. Finish all this medication, even if you have started to feel better.
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
It is very important to take this medication on a regular basis as prescribed. If you miss a dose, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take a double dose to make up for a missed one. If you forget many doses in a row, talk to your doctor about how to resume dosing.
Ritonavir capsules do not need to be refrigerated unless it is kept for longer than 30 days. Store this medication at room temperature, protect it from light and moisture, and keep it out of the reach of children.
Who should NOT take this medication?
Ritonavir should not be taken by anyone who:
- is allergic to ritonavir or to any of the ingredients of the medication
- is taking any of the following medications:
- alpha-1 adrenoreceptor antagonists (e.g., alfuzosin)
- astemizole or terfenadineanti-arrhythmics (e.g., amiodarone, quinidine)
- antihistamines (e.g., terfenadine, astemizole)
- benzodiazepines (e.g., triazolam, midazolam)
- cisapride
- ergot derivatives (e.g., ergotamine, dihydroergotamine, ergonovine, methylergonovine)
- pimozide