To the best of my knowledge, antivirals and the cocktail used to combat aids are not tested for and do not appear on "drug tests". Far more extensive tests exist however, that can show them
AIDS privacy in particular is heavily protected in most States (although how and to what extent varies from state to state), so testing for AIDS-specific medications without the patient's knowledge and consent would likely be a violation of the patients' rights under the State level privacy laws. As there's no recreational market in AIDS meds, these typically don't fall under drug testing protocols.