The adverse health impacts of tobacco smoking are a drain on national resources. This study will test an intervention to promote smoking cessation among young adults aged 18-30years. The intervention will be delivered within two settings in Australian health care; community pharmacies and general practice. The new study builds on the pilot data, reported here, which inform the feasibility, recruitment strategy, outcome measure, effect size and attrition rate. The study is a randomised controlled trial with 200 clients recruited from general practice and community pharmacies in Western Australia.