Inclusion Criteria:  patients in the HIV OPCs current tobacco users patients who live in Hanoi patients reachable by phone  Exclusion Criteria:  patients for whom there is a need for precaution in using NRT will be excluded patients with recent myocardial infarction (2 weeks) patients serious underlying arrhythmias patients who are pregnant or nursing patients are unable to demonstrate capacity for consent patients already enrolled in a tobacco use treatment program.