The reaction can develop several days to 4 weeks after starting the drug. When the drug is stopped, the reaction goes away. But if the drug is ever taken again, the reaction can be more severe and even life threatening. People who develop fever, nausea and rash while taking abacavir should contact their doctor immediately. If the symptoms are a hypersensitivity reaction to the drug, the drug should never be taken again .
Some side effects can affect the nervous system.
Peripheral neuropathy is a side effect caused by damage to the nerves. Symptoms of peripheral neuropathy include tingling, burning, numbness or weakness, usually in the feet and hands. Peripheral neuropathy can be caused by the nucleoside analog drugs ddI , ddC and d4T , but can also be a result of HIV disease itself. Peripheral neuropathy usually disappears a few months after the drug that causes it is stopped. In some cases, peripheral neuropathy can remain a problem.