Rumor about studies

A friend of a friend says the rats they are studying are losing muscle and even muscle in their hearts and when they take them off mounjaro they are suffering heart issues because the muscle in the heart was effected and there now moving to second phase of studies.

Obviously it’s rats not humans but it makes me feel worried about in 5-10 years we’ll see all these warnings about side effects we weren’t told / didn’t know about :/