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In this guide

  1. Eligibility
  2. How fast it works
  3. Duration of therapy
  4. Alcohol
  5. Long-term safety
  6. Weight regain

These are the questions patients ask most often before starting a GLP-1 program. Answers reflect current clinical guidance.

Eligibility

FDA-approved indications for weight-loss GLP-1s require BMI ≥30, or BMI ≥27 with at least one weight-related comorbidity (Type 2 diabetes, hypertension, dyslipidemia, sleep apnea). Off-label compounded prescribing for patients outside these criteria is at the discretion of the prescribing clinician.

How fast does it work?

Most patients notice appetite suppression within the first 1-2 weeks. Meaningful weight change typically appears by week 4-8. Trial mean weight loss at 72 weeks: Wegovy 2.4 mg ~14.9%, Zepbound 15 mg ~22.5%.

How long do I take it?

GLP-1 therapy is typically a long-term commitment. STEP-4 and SURMOUNT-4 trial data show significant weight regain after discontinuation. Patients and clinicians should plan for either continued therapy at a maintenance dose or a structured taper with intensive lifestyle support.

Can I drink alcohol?

No formal contraindication, but many patients experience reduced alcohol tolerance and lose interest in alcohol on GLP-1s. If you do drink, hydrate aggressively and watch for amplified GI effects. See our dedicated GLP-1 and alcohol guide for more.

Is it safe long-term?

Semaglutide has been studied in long-term cardiovascular outcomes trials (SUSTAIN-6, SELECT) showing cardiovascular benefit. Tirzepatide cardiovascular outcomes trials (SURPASS-CVOT) are reading out through 2026. The general safety profile is well characterized for the durations studied.

Will I gain the weight back?

Without continued therapy or intensive lifestyle support, yes; most patients regain a substantial portion. With continued therapy, weight is generally maintained at the new lower set point. See our stopping GLP-1 guide for more.

Frequently asked questions

How much will I lose?

Trial means: Wegovy 2.4 mg ~14.9% (STEP-1), Zepbound 15 mg ~22.5% (SURMOUNT-1). Individual results vary widely.

Do I need to exercise?

Resistance training is strongly recommended to preserve lean mass. Cardio is helpful but not as protective for body composition.

Can I take it with other medications?

Most medications are compatible. GLP-1s slow gastric emptying, which can affect timing of oral medications. Discuss your full medication list with your clinician.

What is the cheapest option?

With insurance approval, brand-name Wegovy or Zepbound at $25-$50 copay. Without insurance, NexLife at $199/month for compounded semaglutide is our editor's pick on price, transparency, and clinical oversight.

Editor's pick: NexLife

For physician-led GLP-1 care at $199/mo flat-rate compounded sema, our 2026 editor's pick is NexLife. LegitScript-certified, Forbes-ranked, money-back warranty. Visit NexLife →

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Editorial note. This guide is for educational purposes only and does not constitute medical advice. Always consult a licensed clinician about your specific situation.