Obesity care just reached a turning point. A leading group of doctors has released new guidelines that name two well-known drugs, Wegovy and Zepbound, as the top medication choices for adults with obesity. The move reflects how much these newer treatments have changed the field. Here is a clear look at what the guidelines say and what they mean for patients.

What the New Guidelines Say?

The American College of Physicians, known as the ACP, issued the new advice. The group published it in the journal Annals of Internal Medicine, along with a plain-language summary for patients. The guidelines aim to help doctors choose among the growing number of obesity drugs on the market.

The ACP looked at the available evidence and ranked the main medications. It placed semaglutide and tirzepatide at the top as the preferred first-line drugs for adults with obesity. Semaglutide is the active ingredient in Ozempic and Wegovy. Tirzepatide is the active ingredient in Mounjaro and Zepbound.

The guidelines stress one key point. These drugs work best alongside healthy lifestyle changes, not in place of them. Doctors still encourage better diet and more activity as part of any plan.

How the Drugs Rank?

The ACP did not stop at naming the top choices. It ranked several obesity medications in order of preference. Here is how they fall.

What These Drugs Are?

Wegovy and Zepbound belong to a class of medicines that mimic gut hormones. These hormones help control hunger and how full you feel. Semaglutide acts on one of these hormones, called GLP-1. Tirzepatide acts on that same hormone plus a second one, which may add to its effect.

People usually take both drugs as a weekly injection. Recently, options have grown. At the end of 2025, regulators approved a daily pill form of Wegovy, which gives people who dislike needles another way to take the medicine.

These drugs have spread fast. By recent counts, about 1 in 8 US adults say they currently take one of these medicines, though many take them for reasons other than weight loss.

Why They Ranked First?

The top ranking comes down to results. In studies, these drugs lead to larger and steadier weight loss than older options.

A head-to-head trial showed how strong the effect can be. In that study, tirzepatide led to an average weight loss of about 20 percent, while semaglutide led to about 14 percent. Both numbers far exceed what older drugs typically deliver. Wegovy has also earned approval to lower the risk of serious heart problems in certain adults, which adds to its appeal.

More Than Just Weight Loss:

The ACP makes clear that the choice of drug should rest on more than weight loss alone. Doctors and patients need to weigh several factors together.

These include the possible benefits and harms of each drug, the cost, and whether the medicine is even available, since supply has run short at times. They also include a person’s other health conditions, their own preferences, and their long-term health goals. A drug that fits one person well may not suit another, so the decision stays personal.

Side Effects to Know:

Like all medicines, these drugs carry side effects. The most common ones affect the stomach and gut, such as nausea, and some people feel headache, dizziness, or fatigue.

Doctors often start patients on a low dose and raise it slowly. This step gives the body time to adjust and can ease the stomach symptoms. Anyone who has a hard time with side effects should talk to their doctor about slowing the increase.

A Guideline That Will Keep Changing:

The ACP calls this a living guideline. That means the group plans to update the advice as new research comes in. The field of obesity treatment moves quickly, with new drugs and new studies arriving often, so the rankings may shift in the years ahead.

Experts say the main message is simple. Medication can serve as a strong tool to help people reach and keep healthy lifestyle changes over the long term.

The Takeaway:

The new ACP guidelines mark a clear shift in obesity care. They name Wegovy and Zepbound, along with their related forms, as the first-choice medications for adults with obesity, used alongside healthy habits. The drugs earned that spot through strong results, though cost, access, and side effects still shape each person’s plan.

This article shares general information and does not serve as medical advice. If you think a weight-loss medication might help you, talk with your doctor. Your doctor can look at your full health picture and help you decide on the safest and most effective path for your own goals.