This study assessed differences among health professions students in exposure to didactic tobacco cessation training in asking about patients' tobacco use status ("ask") and assisting smoking patients to quit by providing educational materials ("assist"). Data from the 2005-08 Global Health Professions Student Survey were analyzed for 28,420 medical, dental, nursing, and pharmacy students in eight low- and middle-income countries. Country-specific prevalence of exposure to training in tobacco cessation was calculated for each profession category; differences were assessed using logistic regression analysis (p<0.05). The proportion of dental students taught to implement the "ask" intervention ranged from 45.4 percent (Armenia) to 95.2 percent (Chile). Only about one-third of these dental students reported being taught to implement the "assist" intervention in most countries. After adjusting for survey year, country, gender, and tobacco use, the odds of dental students' being taught to implement the "ask" intervention were lower than for medical students (adjusted odds ratio [aOR]=0.63; 95% CI: 0.42-0.96). Similarly, the odds of being taught to implement the "assist" intervention were significantly higher for medical (aOR=1.65; 95% CI: 1.26-2.17), nursing (aOR=2.84; 95% CI: 2.37-3.40), and pharmacy students (aOR=1.36; 95CI:1.05-1.76) than for dental students. These findings underscore the need for enhanced measures to incorporate tobacco cessation training as a formal component of dental education globally.