In this article
The short version
- Know exactly what you're getting: the medicine, the form, the dose, and whether it's FDA-approved or compounded.
- A licensed clinician should review your health history before anything is prescribed.
- Ask how your dose will change, what side effects to expect, and who to call.
- Make sure the pharmacy is named and state-licensed, and the full cost is clear.
- Walk away from anyone calling a compounded drug FDA-approved or the same as a brand.
A GLP-1 can be the thing that finally makes weight loss feel possible. In tirzepatide's main study, people lost an average of 15% to 21% of their body weight.
But the right start matters as much as the medicine. Before your first dose, ask these 10 questions. A good provider will be glad you did.
Questions about the medicine
1. What exactly am I getting? Ask for the medicine's name, the form (injection or troche), the strength, and whether it's an FDA-approved brand or a compounded version. They're not interchangeable. A compounded medicine isn't FDA-approved, and it isn't a generic of a brand-name drug.
2. Is it right for me? For Zepbound, the FDA-approved tirzepatide brand, that generally means adults with a BMI of 30 or more, or 27 or more with a weight-related health problem like high blood pressure, high cholesterol, or sleep apnea. Your clinician should also review your history, your other medicines, and anything that rules it out. A questionnaire alone shouldn't be enough to get a prescription.
Questions about safety
3. What side effects should I expect, and when? For tirzepatide, the most common are nausea, diarrhea, constipation, and vomiting. They're usually mild and show up early and after dose increases. Here's our guide to tirzepatide side effects.
4. Is there any reason I shouldn't take it? Tirzepatide isn't for people with a personal or family history of medullary thyroid cancer or MEN 2, anyone who's had a serious allergic reaction to it, or people who are pregnant. It's not recommended with severe gastroparesis.
5. How does it mix with my other medicines? Birth control pills may work less well for 4 weeks after you start and after each dose increase. Insulin and some diabetes pills may need lower doses. And tell any surgeon you take it before a procedure.
Questions about your plan
6. How will my dose change? Tirzepatide usually starts at 2.5 mg a week and steps up by 2.5 mg after at least 4 weeks on each dose, to a maximum of 15 mg. Ask who decides when you move up, and whether you can stay put or step down if you need to.
7. What results are realistic? Study averages are a guide, not a promise.
Your results depend on your dose, your health, how long you stay on it, and your habits.
8. Who do I contact when something feels off? You should know exactly how to reach your care team, how fast they respond, and when to go to urgent care instead.
Questions about the pharmacy and price
9. Who makes my medicine and ships it? You should get the pharmacy's name and contact information and know it's state-licensed. If it's compounded, the label should tell you exactly how much to take, in milligrams.
10. What's the total cost? Ask for the full price, what it includes, how refills and renewals work, and how to cancel. Visits, shipping, and labs can add up if they're billed separately.
Bonus: what happens if I stop?
It's worth asking on day one. In a major study, people who stopped tirzepatide regained much of their weight within a year, while people who stayed on it kept losing. Ask your clinician what long-term care looks like.
Red flags that mean walk away
FDA flags several warning signs for buying GLP-1s online, and a few more are common sense. Walk away if a company:
- Doesn't require a review and prescription from a licensed clinician.
- Offers deep discounts or prices that seem too good to be true.
- Claims a compounded drug is the same as an FDA-approved one, or calls it "generic Zepbound."
- Sells products labeled "for research use" or "not for human consumption."
- Won't tell you which pharmacy makes your medicine.
How Nirvanix answers these questions
Nirvanix is physician-led online care, with no waiting room. A licensed clinician reviews your health history before anything is prescribed and tells you exactly what you're getting. Your plan starts low and moves up only when you're ready, your care team is a message away, and the consultation and shipping are included.
Your clinician can also walk you through FDA-approved options. A compounded medicine is prescribed only when it's legally allowed and right for your situation.
The bottom line
The best GLP-1 start is an informed one. Know what you're getting, why it fits you, what to expect, and who's in your corner, and walk away from anyone who can't answer clearly. Want the full picture first? Read our guide to tirzepatide for weight loss.
Ready to get your questions answered? Take the two-minute quiz.
Common questions
What should I ask my doctor before starting a GLP-1?
Ask exactly which medicine and form you're getting, whether it's right for your health history, what side effects to expect, how your dose will change, who makes it, and the full cost. The 10 questions in this article cover the essentials.
Do I qualify for a GLP-1 for weight loss?
For tirzepatide's FDA-approved brand, Zepbound, that generally means adults with a BMI of 30 or more, or 27 or more with a weight-related health problem like high blood pressure. A clinician also checks for reasons it might not be safe for you.
Is a compounded GLP-1 the same as the brand-name version?
No. A compounded medicine is prepared by a licensed pharmacy for an individual patient. It isn't FDA-approved, and it isn't a generic version of a brand like Zepbound or Mounjaro.
How do I know if an online GLP-1 provider is legitimate?
A legitimate provider requires a review by a licensed clinician, fills your prescription through a state-licensed pharmacy, explains the medicine's FDA status honestly, and shows the full cost upfront. FDA flags deep discounts and claims that a compounded drug equals an approved one as warning signs.
What if a GLP-1 doesn't work for me?
Give it time and talk with your clinician. Results build over months as the dose climbs, and your clinician can review your dose, side effects, and habits before deciding on next steps.
