“I knew it was the drug,” said Heidlebaugh, who said she had not previously suffered from depression. Heidlebaugh is one of four U.S. patients who told Reuters about experiencing suicidal thoughts while taking Novo Nordisk’s popular Ozempic drug, approved to treat type 2 diabetes, or Wegovy, another Novo top-seller approved for weight loss. A fifth patient said he experienced depression and suicidal thoughts after taking Mounjaro, a similar diabetes medicine from Eli Lilly, which is also used for weight loss.