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When and How to Take Ritonavir

General considerations for when and how to take the medication include the following:
  • Ritonavir comes in capsule, tablet, and oral solution (liquid) form. It is usually taken by mouth twice a day.
  • It should be taken with food.


  • Ritonavir tablets should be swallowed whole (not chewed, crushed, or dissolved). 


  • The taste of ritonavir solution can be improved by mixing it with chocolate milk, Ensure®, or Advera®. Be sure to drink the mixture within one hour of mixing it.
  • Try to take ritonavir at the same times every day to maintain an even level in your blood.
  • For the medication to work properly, it must be taken as prescribed. It is very important that you closely follow your healthcare provider's instructions about taking this drug. Missing doses can increase the chance of the virus developing resistance to the medication, thereby making it less effective.

Dosage Information

The dose of ritonavir that your healthcare provider recommends will vary, depending on a number of factors, including:
  • Your age
  • Your weight and height (for children)
  • Other medical conditions you may have
  • Other medications you may be taking.
As with any medication, do not adjust your dose unless your healthcare provider specifically instructs you to do so.
(Click Ritonavir Dosing for more information.)

Drug Interactions

Ritonavir can interact with a number of other medications (see Drug Interactions With Ritonavir).
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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