Braintree Laboratories, Braintree, Mass., expanded its relationship with Lyons Lavey Nickel Swift, N.Y., part of TBWA WorldHealth, by awarding the agency the assignment to create advertising for a new product, Axid Oral Solution, a drug for the treatment of duodenal ulcers. The agency already works on Braintree drugs like HalfLytely. TBWA WorldHealth is part of the TBWA Worldwide unit of the Omnicom Group. Botanical Laboratories, manufacturers of safe and effective complementary medicine and nutritional supplements, has selected Stratagem Healthcare Communications, the San Francisco healthcare advertising agency, to help prepare brand strategy for its nutritional supplements products, which form the core of its portfolio. Initially, Stratagem will help identify appropriate consumer segments and develop a corporate and brand strategy while serving as the full-service marketing and advertising agency to BLI.