Amgen's experimental drug MariTide led to an average weight loss of up to 20% in a year-long mid-stage trial of nearly 600 people who were overweight or obese, the company said on Tuesday.

Shares of Amgen (NASDAQ: AMGN) recently ticked lower despite a very positive-sounding press release regarding its weight management candidate. According to the giant drugmaker, treatment with an anti-obesity candidate called MariTide helped patients reduce their weight by up to 20% after 52 weeks.