GLP-1 FAQ: 50 Questions Real Patients Ask
Clear, evidence-based answers to the 50 most common questions about semaglutide, tirzepatide, and GLP-1 weight loss medications.
Whether you are just learning about GLP-1 medications or already on treatment, questions come up constantly. We compiled the 50 most frequently asked questions from patient communities, clinic consultations, and online forums -- and answered each one with clarity and evidence.
Getting Started (Questions 1-10)
1. What are GLP-1 medications?
Injectable drugs that mimic the GLP-1 hormone to reduce appetite, slow stomach emptying, and improve insulin sensitivity. The main options are semaglutide, tirzepatide, and retatrutide.
2. Who qualifies for GLP-1 weight loss medications?
Adults with BMI 30+ (obesity) or BMI 27+ with at least one weight-related condition (diabetes, high blood pressure, high cholesterol, sleep apnea).
3. How much weight will I lose?
Average results: semaglutide 15-17%, tirzepatide 20-22.5%, retatrutide 24%+ of body weight. Individual results vary widely -- some lose more, some less.
4. How quickly does weight loss start?
Appetite reduction within 1-2 weeks. Measurable weight loss by weeks 4-6. Significant results by months 3-6. Maximum effect at 12-18 months.
5. Do I need a prescription?
Yes. All GLP-1 medications require a prescription from a licensed healthcare provider. Trimi provides telehealth consultations with licensed physicians.
6. How much does it cost?
Brand-name: $1,000-1,400/month. Compounded through Trimi: semaglutide $99/month, tirzepatide $125/month -- all-inclusive with medication, provider, and shipping.
7. Do I need insurance?
Not with compounded options. Trimi's pricing does not require insurance. Brand-name medications may be covered by some insurance plans.
8. What is compounded semaglutide?
, produced by FDA-registered compounding pharmacies during FDA-recognized shortages. Third-party tested for potency and sterility.
9. Which GLP-1 is best for me?
Depends on your goals, budget, and medical history. Most providers start with semaglutide ($99/mo). If you need more efficacy, tirzepatide ($125/mo) or retatrutide are options. Trimi offers all three.
10. Is it safe?
Yes. Semaglutide has 5+ years of safety data and proven cardiovascular benefits (SELECT trial). Side effects are mostly GI-related and typically temporary. Serious adverse events are rare.
Side Effects & Safety (Questions 11-20)
11. What are the most common side effects?
Nausea (25-44%), diarrhea (20-30%), constipation (15-24%), vomiting (10-24%), abdominal pain (15-20%). Most improve within 4-8 weeks.
12. How do I manage nausea?
Eat smaller meals, avoid greasy/fatty foods, stay hydrated, eat slowly, follow the gradual titration schedule, and consider ginger or peppermint tea. Full guide here.
13. Does GLP-1 cause hair loss?
Some patients report temporary hair thinning (telogen effluvium). This is related to rapid weight loss, not the medication itself. It typically resolves. Adequate protein, biotin, and iron help.
14. Can GLP-1 cause pancreatitis?
Very rare (less than 0.3%). Seek immediate medical attention for severe abdominal pain radiating to the back. Risk is higher in those with gallstones or history of pancreatitis.
15. Does it cause thyroid cancer?
Thyroid C-cell tumors were observed in rodent studies at very high doses. This has not been confirmed in humans across millions of prescriptions. Contraindicated in patients with personal/family history of medullary thyroid carcinoma.
16. Can I drink alcohol?
Moderate alcohol is generally fine but can worsen nausea. Many patients naturally reduce alcohol intake. Heavy drinking is not recommended. Full alcohol guide here.
17. Will I lose muscle?
Some muscle loss occurs with any weight loss. Minimize it with 1.0-1.5g protein/kg body weight daily and resistance training 2-3x/week. Full muscle preservation guide.
18. Does it interact with other medications?
GLP-1 medications slow gastric emptying, which can affect absorption of some oral drugs. Oral contraceptives, thyroid medications, and certain antibiotics may need timing adjustments. Full interaction guide.
19. Can I take it with metformin?
Yes. GLP-1 medications and metformin are commonly used together, especially for patients with type 2 diabetes or insulin resistance. They work through different mechanisms and are complementary.
20. Is it addictive?
No. GLP-1 medications are not addictive and have no abuse potential. They do not create physical dependence. However, weight regain after stopping is common due to the return of biological appetite signals.
Lifestyle & Practical (Questions 21-35)
21. What should I eat on GLP-1?
Prioritize protein at every meal, eat plenty of vegetables, choose whole grains, stay hydrated. Avoid large fatty meals that worsen nausea. Detailed meal plan here.
22. How do I inject it?
Subcutaneous injection in the abdomen, thigh, or upper arm using a thin needle. Clean the area with alcohol, pinch the skin, insert at 90 degrees, inject slowly, hold for 5-10 seconds. Takes under 30 seconds.
23. Does it hurt?
Most patients report minimal discomfort -- a slight pinch or pressure. The needles are very thin (30-31 gauge). Most people find it much less painful than expected.
24. What day should I inject?
Any day works -- choose one and stick to it weekly. Many patients prefer Thursday or Friday so early nausea falls on the weekend. You can shift by a day if needed.
25. How do I store GLP-1 medication?
Refrigerate at 36-46F (2-8C). In-use medication can be at room temperature (up to 86F) for up to 28 days. Never freeze. Protect from light and heat. Travel storage tips here.
26. Can I exercise on GLP-1?
Absolutely. Exercise enhances results and helps preserve muscle. Combine resistance training with moderate cardio. Start gradually if new to exercise. Exercise guide here.
27. What if I miss a dose?
If within 5 days of the missed dose, take it as soon as you remember. If more than 5 days, skip and take the next scheduled dose. Do not double dose.
28. Can I travel with GLP-1 medication?
Yes. Keep it cool during travel with a medication travel case. Bring your prescription documentation. TSA allows injectable medications with proper labeling. Travel guide here.
29-35. More Practical Questions
29. Can I get pregnant on GLP-1? -- Improved fertility is possible; use contraception if not planning pregnancy. 30. Should I take vitamins? -- Yes, especially D, B12, and a multivitamin. 31. How often do I see my doctor? -- Monthly initially, then every 2-3 months. 32. What blood tests do I need? -- Baseline and every 3-6 months. Lab schedule here. 33. Can I take it with coffee? -- Yes. 34. Does it affect sleep? -- Most patients report improved sleep quality due to weight loss and reduced apnea. 35. When will I see results? -- Measurable weight loss typically by week 4-6.
Long-Term & Advanced (Questions 36-50)
36-40. Duration & Maintenance
36. How long do I stay on it? -- Most providers recommend long-term use; discuss with your physician. 37. What happens if I stop? -- Weight regain of 50-70% is common within a year. 38. Can I take a lower maintenance dose? -- Many patients maintain on reduced doses. 39. Will my body adapt and it stop working? -- True tolerance is rare; plateaus are usually addressable. 40. Can I switch between GLP-1 medications? -- Yes, seamlessly at Trimi.
41-45. Comparisons & Choices
41. Semaglutide vs tirzepatide? -- Tirzepatide produces more weight loss; semaglutide is more affordable and has more data. 42. Brand vs compounded? -- Same active ingredient; compounded is much cheaper. 43. Injection vs oral? -- Injectable is more effective; oral semaglutide is available for diabetes. 44. GLP-1 vs bariatric surgery? -- Both effective; GLP-1 is less invasive but may require long-term use. 45. Is tirzepatide worth the extra $26/month? -- If you need more weight loss, the additional efficacy may justify the cost.
46-50. Special Situations
46. Can seniors take GLP-1? -- Yes, with appropriate monitoring. Senior guide here. 47. GLP-1 with PCOS? -- Excellent option; addresses insulin resistance. PCOS guide here. 48. GLP-1 after bariatric surgery? -- Sometimes used; requires specialist guidance. 49. What is retatrutide? -- A triple agonist producing 24%+ weight loss; available through Trimi. 50. How do I get started? -- Visit trytrimi.com/treatments to begin your free consultation.
Have More Questions? Get Personalized Answers
Start with a free consultation. Semaglutide $99/month. Tirzepatide $125/month. No insurance required.
Medical Disclaimer
This FAQ is for informational purposes only and does not replace professional medical advice. GLP-1 medications are prescription drugs requiring physician supervision. Individual situations vary. Always consult your healthcare provider for personalized guidance.
More on GLP-1 education
Sources & References
- Wilding JPH et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. NEJM 2021;384:989-1002.
- Jastreboff AM et al. Tirzepatide Once Weekly for the Treatment of Obesity. NEJM 2022;387:205-216.
- Lincoff AM et al. Semaglutide and Cardiovascular Outcomes in Obesity without Diabetes. NEJM 2023;389:2221-2232.
- FDA Prescribing Information for Wegovy (semaglutide) and Zepbound (tirzepatide).