Key takeaways
- Zepbound (tirzepatide) is a brand-name injection prescribed for weight loss, weight management, and more.
- You may need to take Zepbound for several months to see the full effects of the drug for weight loss.
- Certain factors may affect how much weight you lose when administering Zepbound, such as whether you are eating a balanced diet or engaging in regular physical activity.
Zepbound affects certain hormones in your body that slow the passage of food through your gut, which helps you feel fuller for longer. It also regulates hunger by decreasing food cravings and maintaining your insulin and glucose levels. These effects can help you lose and manage your weight.
If you are not losing weight on Zepbound, it’s important to note that weight loss varies from person to person. Most research on Zepbound looks at weight loss over a longer period of time, such as 52 or 72 weeks. You may need to take Zepbound for several months to see its full effects. Additionally, Zepbound works best when used in combination with a balanced diet and increased physical activity.
Dosing basics
Typically, you’ll start on 2.5 milligrams (mg) of Zepbound once per week for 4 weeks. After 4 weeks, your dosage will likely increase to 5 mg once per week. Your doctor may continue to increase your dose by 2.5 mg every 4 weeks until the drug is working as desired to manage your condition.
The maximum dose of Zepbound for weight loss and weight management is 15 mg once per week.
Average weight loss results
You are more likely to notice weight loss results with Zepbound the longer you use the drug, such as 52 or 72 weeks.
Results after 2 weeks of Zepbound treatment
After 2 weeks of Zepbound treatment, you probably won’t notice significant changes in your weight. That’s because it takes time for the medication to work. However, you may start to experience certain changes, such as decreased appetite, feeling fuller for longer, or less food cravings.
Results with continued Zepbound treatment
Zepbound’s clinical trials looked at the results of adult participants over 72 weeks (18 months). Study 1 included people with overweight or obesity without diabetes. Study 2 included people with overweight or obesity and type 2 diabetes.
The following table highlights the percentages of body weight the study participants lost in Study 1 and Study 2.
| Tirzepatide dose | Study 1: Weight loss by % body weight | Study 2: Weight loss by % body weight |
| Placebo | 3.1% | 3.2% |
| 5 mg | 15% | — |
| 10 mg | 19.5% | 12.8 |
| 15 mg | 20.9% | 14.7% |
After 72 weeks, people administering 15 mg of Zepbound once per week experienced an average weight loss of up to 20.9% of their body weight. This means that a person weighing 250 pounds (lb) could have a weight loss of approximately 52 lb.
In general, higher doses of Zepbound (10 mg and 15 mg) were associated with increased weight loss.
You may notice weight gain while using Zepbound for a variety of reasons. Some of the factors that may affect your weight loss efforts or may cause you to gain weight include:
- being on too low of a Zepbound dose
- weight fluctuations due to retaining water or being constipated
- not eating a balanced diet
- not engaging in regular physical activity
- having an underlying health condition
- stopping the drug too soon
If you are noticing you are gaining weight while on Zepbound, talk with your doctor. They can suggest ways to help the medication work more effectively or recommend other drugs to help you manage your condition.
Zepbound is not a quick fix for weight loss. Most people will need to continue using the drug for several months to see the full effects of it.
Also, various factors may affect how much weight you lose with Zepbound treatment. For best result, use Zepbound in combination with a balanced diet and regular physical activity.