Johnna Mendenall had never been “the skinny friend,” she said, but the demands of motherhood – along with a sedentary desk job – made weight management even more difficult. Worried that family type 2 diabetes would catch up with her, she decided to start Wegovy shots for weight loss.
She was nervous about potential side effects. It took 5 days of staring at the Wegovy pen before she worked up the nerve for her first .25-milligram shot. And sure enough, the side effects came on strong.
“The nausea kicked in,” she said. “When I increased my dose to 1 milligram, I spent the entire night from 10 p.m. to 5 a.m. vomiting. I almost quit that day.”
While gastrointestinal (GI) symptoms seem to be the most common, a laundry list of others has been discussed in the news, on TikTok, and across online forums. Those include “Ozempic face,” or the gaunt look some get after taking the medication, along with hair loss, anxiety, depression, and debilitating fatigue.
Ms. Mendenall’s primary side effects have been vomiting, fatigue, and severe constipation, but she has also seen some positive changes: The “food noise,” or the urge to eat when she isn’t hungry, is gone. Since her first dose 12 weeks ago, she has gone from 236 pounds to 215.
Warning label
Wegovy’s active ingredient, semaglutide, mimics the role of a natural hormone called glucagonlike peptide–1 (GLP-1), which helps you feel well fed. Semaglutide is used at a lower dose under the brand name Ozempic, which is approved for type 2 diabetes and used off-label for weight loss.
Both Ozempic and Wegovy come with a warning label for potential side effects, the most common ones being nausea, diarrhea, stomach pain, and vomiting.
With the surging popularity of semaglutide, more people are getting prescriptions through telemedicine companies, forgoing more in-depth consultations, leading to more side effects, said Caroline Apovian, MD, professor of medicine at Harvard Medical School and codirector of the Center for Weight Management and Wellness at Brigham and Women’s Hospital, Boston.
Specialists say starting with low doses and gradually increasing over time helps avoid side effects, but insurance companies often require a faster timeline to continue covering the medication, Dr. Apovian said.
“Insurance companies are practicing medicine for us by demanding the patient go up in dosage [too quickly],” she explained.
Ms. Mendenall’s insurance has paid for her Wegovy shots, but without that coverage, she said it would cost her $1,200 per month.
There are similar medications on the market, such as liraglutide, sold under the name Saxenda. But it is a daily, rather than a weekly, shot and also comes with side effects and has been shown to be less effective. In one clinical trial, the people being studied saw their average body weight over 68 weeks drop by 15.8% with semaglutide, and by 6.4% with liraglutide.
Tirzepatide, branded Mounjaro – a type 2 diabetes drug made by Eli Lilly that may soon gain Food and Drug Administration approval for weight loss – could have fewer side effects. In clinical trials, 44% of those taking semaglutide had nausea and 31% reported diarrhea, compared with 33% and 23% of those taking tirzepatide, although no trial has directly compared the two agents.