Research Seen Risk to AstraZeneca PLC’s (JOBS) Nexium, Not Sanofi-Aventis (France)'s Plavix

LONDON, March 4 (Reuters) - New research suggesting the blood thinner Plavix interacts badly with common heartburn drugs is a potential threat to AstraZeneca’s (AZN.L) top-seller Nexium rather than Sanofi-Aventis’s (SASY.PA) Plavix, analysts said.

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