Mounjaro in Seoul: a tirzepatide program run by an internist

What a Mounjaro program in Seoul looks like

Mounjaro is the brand name of tirzepatide, a once-weekly injection that activates two hormone receptors, GIP and GLP-1. Together these lower blood sugar after meals, slow stomach emptying and reduce appetite. In Korea, the Ministry of Food and Drug Safety has approved Mounjaro for type 2 diabetes and, alongside a reduced-calorie diet and exercise, for chronic weight management in adults who meet body mass index criteria. Label wording and pharmacy supply can change, so we confirm the current situation at your visit.

A Mounjaro Seoul program at VEI Clinic is led by Dr. HyunSung Park, a board-certified internal medicine specialist and ECFMG-certified graduate of the State University of New York who has treated patients in Korea since 2010. Because tirzepatide affects blood sugar, digestion and the gallbladder, an internist's oversight is useful, especially if you already have diabetes, fatty liver, high blood pressure or high cholesterol.

Who Mounjaro suits, and who should not use it

For weight management, the label is intended for adults with a BMI of 30 or more, or 27 or more with a weight-related condition. For type 2 diabetes, it is used to improve blood sugar control, often with welcome weight loss. It is not for type 1 diabetes or diabetic ketoacidosis, and it does not replace eating well, moving more and sleeping enough.

Mounjaro should be avoided, or needs special care, if you have:

• A personal or family history of medullary thyroid cancer or MEN2
• Pregnancy, breastfeeding or plans to conceive soon
• Previous pancreatitis or active gallbladder disease
• Severe digestive problems such as gastroparesis
• Diabetic retinopathy, since a fast fall in blood sugar can temporarily worsen it
• Insulin or sulfonylurea treatment, which may need dose reduction to prevent low blood sugar
• Oral contraceptive use, because absorption may be reduced for four weeks after starting and after each dose increase, so a backup method is advised

Labs, dose steps and switching from another medicine

Your first visit includes a full history, a medicine and supplement review, and measurement of weight, waist and blood pressure. Baseline tests usually include HbA1c, kidney and liver function, lipids and a urine albumin check if you have diabetes. If you have diabetes, we also ask when your eyes were last examined.

Tirzepatide begins at 2.5 mg once a week for four weeks. This is a starting dose to let your stomach adjust, not a treatment dose. The dose then rises in 2.5 mg steps, at least four weeks apart, only as far as you need and tolerate. Many people do well without reaching the top dose. If you are already on semaglutide, Dr. Park plans the switch, including the timing and a sensible starting dose based on how you tolerated the previous drug.

Side effects to expect, and what helps

Nausea, reduced appetite, diarrhea, constipation, vomiting, indigestion and burping are the most common effects, typically during the first weeks and after dose increases. Eating smaller meals, stopping at the first sense of fullness, drinking enough water, limiting fatty and very sweet foods, and avoiding late heavy dinners usually help. Injection-site redness is usually mild; rotating between abdomen, thigh and upper arm reduces it.

Less common risks include gallstones, pancreatitis, kidney strain from dehydration, and low blood sugar in people on other diabetes medicines. Because muscle can be lost along with fat, the program includes protein targets and resistance exercise. If you need endoscopy, surgery or sedation elsewhere, tell the team, since tirzepatide slows stomach emptying and may need to be paused beforehand.

Warning signs: when to seek emergency care

Call 119 or go to an emergency department for severe upper abdominal pain that does not settle, especially if it goes through to the back or comes with vomiting. Seek urgent care too for pain under the right ribs with fever or yellow skin, vomiting that stops you keeping fluids down, black or bloody stools, dizziness or fainting from dehydration, or signs of an allergic reaction such as facial swelling or difficulty breathing. If you take insulin and have shaking, sweating or confusion, treat low blood sugar first, then seek help.