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Complete Guide to GLP-1 Medications

How GLP-1 medications like Ozempic, Wegovy, Mounjaro and Zepbound work, what each is FDA-approved for, and habits that help. Last reviewed against FDA labeling on September 24, 2026.

By ShotWise team · Published · Updated

Overview

Understanding GLP-1 Medications

GLP-1 (Glucagon-Like Peptide-1) medications are a class of drugs that help regulate blood sugar levels and promote weight loss by mimicking the effects of the natural GLP-1 hormone in your body. These medications have revolutionized the treatment of type 2 diabetes and obesity.

Available Medications

Common GLP-1 Options

Ozempic (semaglutide)

Ozempic is a once-weekly injection FDA-approved for adults with type 2 diabetes. It starts at 0.25 mg for 4 weeks, then 0.5 mg, and can be increased to 1 mg and then 2 mg if more blood sugar control is needed. It is not FDA-approved for weight management; the weight-management version of semaglutide is Wegovy.

Mounjaro (tirzepatide)

Mounjaro is a once-weekly GIP and GLP-1 receptor agonist FDA-approved for type 2 diabetes in adults and children 10 and older. It starts at 2.5 mg and can be increased in 2.5 mg steps, at least 4 weeks apart, up to 15 mg in adults. It is not FDA-approved for weight management.

Zepbound (tirzepatide)

Zepbound contains the same active ingredient as Mounjaro but is FDA-approved for chronic weight management and for moderate to severe obstructive sleep apnea in adults with obesity. It starts at 2.5 mg for 4 weeks and can be increased in 2.5 mg steps up to 15 mg.

Wegovy (semaglutide)

Wegovy contains the same active ingredient as Ozempic but is FDA-approved for chronic weight management, for lowering cardiovascular risk in adults with heart disease and obesity or overweight, and for MASH with liver fibrosis. The injection steps up from 0.25 mg to a 1.7 mg or 2.4 mg weekly maintenance dose; adults who need more weight reduction can go up to 7.2 mg weekly.

Doses above are from each product's FDA prescribing information; your prescriber sets your dose. See the full, sourced GLP-1 medication comparisons.

Mechanism of Action

How They Work

GLP-1 medications work through several mechanisms:

  • Digestion Control

    Slowing down digestion and increasing feelings of fullness

  • Appetite Management

    Reducing appetite and food cravings

  • Blood Sugar Regulation

    Helping regulate blood sugar by stimulating insulin production

  • Hormone Balance

    Reducing glucagon secretion, which helps maintain healthy blood sugar levels

Best Practices

Recommended Practices

  • Medication Schedule

    Take your medication consistently on schedule

  • Hydration

    Stay hydrated throughout the day

  • Portion Control

    Eat smaller portions and listen to your body's fullness signals

  • Injection Management

    Track your injections and rotate injection sites

  • Side Effect Monitoring

    Monitor and record any side effects

Practices to Avoid

  • Dosing Changes

    Skip doses or change dosing schedule without consulting your doctor

  • Side Effects

    Ignore persistent side effects

  • Injection Sites

    Forget to rotate injection sites

  • Device Sharing

    Share injection devices with others

  • Discontinuation

    Stop taking medication without medical supervision

Medical Disclaimer: This guide is for informational purposes only and should not replace professional medical advice. Always consult with your healthcare provider about your specific medical condition and treatment options.

For the app behind these guides, see ShotWise shot and weight tracking.


Track Your GLP-1 Journey with ShotWise

Log each dose and injection site, set dose reminders on your schedule, and chart your weight over time. Free to download on iPhone and Android, with in-app purchases.

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