Skip to the reading The consultation notebook A guide to online semaglutide care Find a page Before a visit Start with the whole visit What semaglutide is Prepare your questions Check the care plan How online care is checked Tests and checks Check the pharmacy Read the full price Keep the questions going Caution notes Plan the follow-up Read the evidence Side effects and reasons to pause # Know what needs attention Keep this in mind Bring concerns into the consultation before agreeing to treatment. Ask which symptoms need a message, a prompt review or emergency help. Medicine safety information checked September 26, 2026. ## Stomach problems are common Wegovy injection’s official medicine information, called the label, lists common side effects: constipation, feeling sick to your stomach, vomiting and diarrhea. Wegovy side-effect information In its adult weight-loss studies, 44% of people on Wegovy injection felt sick to their stomach, compared with 16% on a dummy injection. The label also reports severe stomach reactions. Losing fluid through vomiting or diarrhea has been linked to kidney injury. Warnings about fluid loss Severe gastroparesis means very slow stomach emptying; the label does not recommend Wegovy for people with that condition. Keep this in mind The small gland called the thyroid sits in your neck. The warning about tumors there needs both parts: what happened in animals, and what remains unknown in people. ## Understand the thyroid caution The Food and Drug Administration (FDA) has no stronger warning format than a boxed warning. Semaglutide’s warning describes thyroid tumors in rats and mice; whether it causes those tumors in humans is unknown. The boxed warning The rare cancer named in this warning involves a particular group of thyroid cells called C cells. Its medical name is medullary thyroid cancer. A personal or family history of that specific cancer means the label says semaglutide must not be used. If all you know is that a relative had thyroid cancer, tell the person treating you. Ask for help finding the exact diagnosis before deciding on treatment. The label also rules semaglutide out for people with MEN 2, short for multiple endocrine neoplasia type 2. The name refers to a rare condition involving tumors in glands that make hormones, the body’s chemical messengers. It is inherited, meaning it can pass from parent to child. If that name appears in your family’s medical history, bring it to the visit. If you are unsure of a family diagnosis, ask for help checking it. A previous serious allergic reaction to semaglutide or any of its other ingredients also rules it out. ## Know the route to urgent help An emergency call to 911 is MedlinePlus’s advice for severe allergic symptoms, including difficulty breathing and swelling of the tongue or face. MedlinePlus emergency guidance The Wegovy label describes lasting or severe belly pain, sometimes reaching the back, as a possible sign of pancreas inflammation. Label warning on pancreas inflammation Ask the person treating you in advance how to get prompt medical help for that symptom. Keep this in mind A safety claim in an advert still needs checking. Look at the proposed medicine and the way care is provided. ## Pause at these claims and gaps The FDA warns against two service gaps: selling medicine without checking the need for a prescription, and having no licensed doctor available for questions once it arrives. Another FDA warning concerns offers that describe a compounded drug as equivalent to an FDA-approved medicine. Compounded medicine is made to order, with a doctor or pharmacy preparing it. FDA warning signs for online care Watch for “not for human consumption” on a product offered for people to use; another warning label is “for research purposes”. These words do not mean an approved medicine that has been studied. The FDA advises against buying these products because their quality is unknown and they could be harmful. FDA warning about research-use labels Go back to the pharmacy checks → Open the evidence notes ## A closer look at the evidence ### Keep the caution with its context The label describes both common reactions and serious cautions. The animal thyroid finding does not establish what happens in humans. Label warning on pancreas inflammation MedlinePlus emergency guidance FDA warning about research-use labels When you are ready Plan the follow-up → A guide is what this notebook offers: help with the care questions, without running a clinic or selling medicine. Return to the start Evidence notebook Read as plain text