A recent diet trend is to take diabetes drugs for the purpose of losing weight. But taking medications for off-label use can be risky.

Lauren and Haley each say they were prescribed a diabetes drug for weight loss – both had very serious reactions, and both ended up hospitalized.

“I got very sick. Nauseous, vomiting, hunched over in pain. I was tachycardic,” says Haley, who no longer takes the medication.

Lauren, who describes similar symptoms, says she also wound up in the hospital with gastritis. She says she now takes a similar diabetes medication but at much lower doses.

David Nazarian, M.D., a physician at My Concierge MD in Beverly Hills says not only can the side effects of these medications be dangerous – the medications can sometimes trigger other conditions, such as gallbladder disease, pancreatitis, and more.

“I’m seeing and hearing – people are just being prescribed these medications without proper workup and follow-up,” says Dr. Nazarine in the video above. Additionally, he says the weight loss achieved while taking diabetes medication often isn’t permanent.

This episode of Dr. Phil, “Dangerous Diet Crazes?” airs Tuesday. Check your local listing to find out where to watch.

WATCH: Woman Claims High Fruit, Raw Vegan Diet Can Cure Everything From Addiction To Cancer

TELL DR. PHIL YOUR STORY: Need Dr. Phil to get real with someone?