REVERSE TRANSCRIPTASE INHIBITOR

a drug that blocks retroviral replication by interfering with the reverse transcriptase enzyme. RTI drugs are not effective after a cell has already been infected. RTI drugs include nucleoside analogs (e.g., AZT, ddI, 3TC, d4T) and non-nucleoside reverse transcriptase inhibitors (e.g., nevirapine, delavirdine).