Most rashes from HIV medications disappear within a month. The HIV drugs most likely to cause allergic rash are nevirapine and efavirenz. The rash is usually a mild or moderate maculopapular, erythematous rash distributed on the trunk, face, or extremities, and in most patients, the rash will disappear within a month. Taking HIV medication, if an allergic rash occurs, it is recommended to consult a doctor to see if the medication needs to be discontinued immediately or replaced with another medication; secondly, drink plenty of fluids to speed up the excretion of the medication, while closely monitoring the changes in the rash. If the rash continues to worsen, or persists without relief, it is recommended to consult a doctor for treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.