GLP-1 drugs, and dual GIP/GLP-1 drugs like tirzepatide, are used for conditions such as type 2 diabetes, obesity, overweight with risk factors, and in some cases cardiovascular risk reduction. The American Diabetes Association notes that these medication classes are recommended for some people with type 2 diabetes, and several have also been FDA-approved for weight management.

What “used with caution” means

Use FDA-approved medication only.
Avoid “research,” fake online, or poorly supervised compounded versions. The FDA has warned about fraudulent GLP-1 products, dosing errors, and adverse events with some compounded semaglutide and tirzepatide products, including cases requiring hospitalization.

Start low and increase slowly.
Many side effects happen when the dose is too high, increased too quickly, or the person eats too much fatty/heavy food while the stomach is emptying more slowly.

Watch for common side effects.
Nausea, vomiting, constipation, diarrhea, reflux, low appetite, and abdominal discomfort are common.

Know the serious warning signs.
Call a doctor promptly for severe or persistent abdominal pain, vomiting that will not stop, dehydration, fainting, signs of gallbladder pain, allergic reaction, vision changes in diabetes, or very low blood sugar if also using insulin or sulfonylureas. FDA prescribing information lists risks including pancreatitis, gallbladder disease, kidney injury from dehydration, severe GI reactions, hypoglycemia with insulin-type medications, diabetic retinopathy complications, and aspiration risk around anesthesia/deep sedation.

People who need extra caution or should avoid them

GLP-1s may not be appropriate for people with:

• Personal or family history of medullary thyroid carcinoma or MEN 2

• Prior serious allergic reaction to the medication

• Severe gastroparesis or major GI motility problems

• History of pancreatitis or gallbladder disease

• Kidney disease or high dehydration risk

• Pregnancy, trying to conceive, or breastfeeding

For semaglutide used for weight/CV risk reduction, the FDA label says it should be discontinued when pregnancy is recognized and stopped at least 2 months before a planned pregnancy because of the drug’s long half-life.

Nutrition matters a lot

Because appetite drops, people can accidentally undereat. That can mean muscle loss, fatigue, constipation, low protein intake, and nutrient gaps. A safer nutrition approach is:

Protein at each meal, plenty of fluids, fiber-rich foods, strength training, and small balanced meals.

Bottom line: GLP-1s can be safe and very helpful for the right person — but safest when treated as serious prescription medicine, not a shortcut.