Viking stock catapulted Tuesday on "stellar" test results for its weight-loss shot, sending shares of rivals Eli Lilly (LLY) and Novo (NVO) lower. The study examined a every-other-week and monthly doses of Viking Therapeutics' (VKTX) shot, VK2735, for three months as a means of maintaining weight loss on a weekly dose. Patients on the every-other-week schedule maintained up to 97%…

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