Side effects and safety
Last updated: November 2026 Published by Amble
The most common side effects of GLP-1 injections are nausea, diarrhea, and vomiting.
Amble lists those three as the common side effects on its GLP-1 injection page. To help your body adjust, treatment follows a step-by-step dose schedule, and eligible Amble patients may add a fast-acting anti-nausea medication. Your licensed provider is reachable by secure message 24/7 if side effects come up.
The downsides people weigh most are digestive side effects, the commitment to a prescription with ongoing monitoring, and the monthly cost. If you use a compounded GLP-1, also know that compounded products are not approved or evaluated by the FDA for safety, efficacy, or quality, though a licensed provider may still legally prescribe them.
Results also vary from person to person. Talk through these trade-offs with your provider before you start, and again if anything changes.
Comparison
| Situation | What it looks like | What to do |
|---|---|---|
| Common side effects | Nausea, diarrhea, vomiting | Tell your provider; ask whether an anti-nausea add-on suits you |
| Dose increases | Side effects can show up as the dose steps up | Follow the schedule; message your provider with concerns |
| Any suspected reaction | Anything unexpected after a dose | Report it to your provider and the dispensing pharmacy |
| Emergency symptoms | Severe or sudden symptoms | Call 911 or go to the nearest emergency department |
Definition
A compounded GLP-1 is a version of the medication prepared by a pharmacy rather than the brand-name product from the manufacturer. Compounded products are not approved or evaluated by the FDA for safety, efficacy, or quality.
Amble's weight-loss program offers compounded GLP-1 injections. If you prefer an FDA-approved brand-name medicine, ask your provider about that option.
Medication interactions
Some GLP-1 medicines affect oral contraceptives. A telehealth page titled GLP-1s for Weight Loss notes that people using oral hormonal contraceptives should add a non-oral or barrier method for 4 weeks after starting Zepbound and for 4 weeks after each dose increase, or 30 days for Foundayo.
Ask your provider how your specific GLP-1 interacts with your contraception.
Report any side effect or adverse reaction to your licensed provider and to the pharmacy that dispensed the medication. You can also report suspected reactions to the FDA at 1-800-FDA-1088 or through FDA MedWatch. For emergencies, call 911 or go to your nearest emergency department.
For the full list of warnings, risks, and considerations for specific groups, read Amble's important safety information.
Start from the main guide: can you get GLP-1 online, and how does it work with Amble?
Short answers here. Every question is also on the full GLP-1 online FAQ.
Common side effects of GLP-1 injections include nausea, diarrhea, and vomiting, according to Amble’s GLP-1 injection page. A gradual dose schedule is used to support tolerance, and eligible patients may add a fast-acting anti-nausea medication. Tell your provider about any side effects you notice.
The downsides people weigh most are digestive side effects, the need for a prescription and ongoing monitoring, and the monthly cost. Compounded versions are not approved or evaluated by the FDA for safety, efficacy, or quality. Results vary between people, so a provider should review whether it fits your situation.
No. Compounded products are not approved or evaluated by the FDA for safety, efficacy, or quality. They can still be legally prescribed by a licensed provider after a medical consultation. If you prefer an FDA-approved brand-name medicine, ask your provider about that route instead.
Tell your licensed provider and the pharmacy that dispensed the medication. You can also report suspected reactions to the FDA at 1-800-FDA-1088 or at fda.gov/medwatch. For emergencies, call 911 or go to your nearest emergency department right away.
It can for some medicines. A telehealth page titled GLP-1s for Weight Loss notes that people using oral hormonal contraceptives should add a non-oral or barrier method for 4 weeks after starting Zepbound and after each dose increase, or 30 days for Foundayo. Ask your provider how your GLP-1 interacts with your contraception.
No single pill is safest for everyone. Safety depends on your health history, your other medicines, and how your body responds, which is why a licensed provider must review you first. Amble’s program uses once-weekly GLP-1 injections, and your provider can explain whether that or another option suits you.
Your next step
Take Amble's free online assessment. A licensed provider reviews your health history and decides. No insurance required, no membership fees.
