When this happens, the drug will stop working. If you take a protease inhibitor by itself, resistance develops within one month. When you take more than one antiviral drug at the same time, HIV mutates much more slowly and it takes much longer for resistance to develop. Sometimes, if you develop resistance to one drug, you will also have resistance to other antiviral drugs. Doctors are excited about Kaletra because it provides blood levels that are high enough to control HIV that has already developed some resistance to other protease inhibitors.
Resistance can develop quickly.
It is very important to take protease inhibitors according to instructions, on schedule, and not to skip or reduce doses. Kaletra is taken by mouth as a capsule. The normal dose is three capsules twice a day. Kaletra should be taken with food. Kaletra is also available in liquid form.