Content
Ritonavir is an antiretroviral substance that inhibits an enzyme, known as protease, preventing the replication of the HIV virus. Thus, although this medicine does not cure HIV, it is used to delay the development of the virus in the body, preventing the onset of AIDS.
This substance can be found under the trade name Norvir and is usually provided free by SUS, for people with HIV.
How to use
The recommended dose of ritonavir is 600 mg (6 tablets) twice a day. Generally, treatment starts with smaller doses and can be gradually increased, up to the full dose.
Therefore, ritonavir should be started with doses of at least 300 mg (3 tablets) twice daily for 3 days, in increments of 100 mg, until the maximum dose of 600 mg (6 tablets) is reached, two times a day for a period of time that should not exceed 14 days. The maximum daily dose is 1200 mg daily.
Ritonavir is usually used together with other HIV medications, as it enhances its effects. Learn more about HIV and AIDS.
Doses may vary according to each person, so it is very important to follow all the doctor's instructions.
Possible side effects
Some of the side effects that can arise with prolonged use of ritonavir include changes in blood tests, hives, headache, dizziness, insomnia, anxiety, confusion, blurred vision, changes in blood pressure, abdominal pain, nausea, diarrhea, excess gas, acne and joint pain.
In addition, ritonavir also reduces the absorption of some oral contraceptives and, therefore, if you are being treated with this medicine it is very important to use another contraceptive method to prevent a possible unwanted pregnancy.
Who should not take
Ritonavir is contraindicated for people who are hypersensitive to any of the components of the formula. In addition, ritonavir can also interact with the effect of several types of medication and, therefore, its use should always be guided and evaluated by a doctor.