A friend mentions they have GLP-1 medicine left over and offers it to you. They may be trying to save you money or help while you're waiting for your own care. Even so, a prescription isn't something to pass along with the best of intentions.
The safest answer is to use medicine prescribed for you and ask your own care team about the next step. That applies whether the offer is a pen, a vial or another form.
A familiar name doesn't make the plan identical
Two people may talk about “a GLP-1” while using different medicines, strengths or devices. Even when the name sounds familiar, your health history, other medicines and treatment instructions matter.
Someone else's experience can't tell you which product or schedule is right for you. Taking what they have left may mean using a medicine or amount that doesn't match your needs. A label or a dose discussed online is not a substitute for an individual plan.
If you already have a prescription and are facing a delay, call your pharmacy or prescriber. Explain when your next dose is due and what supply you have. Ask what they recommend for your exact medicine rather than borrowing a friend's supply.
Injection devices aren't community supplies
Pens, cartridges, needles and syringes should not be shared between people. Changing a needle doesn't make a previously used pen safe for someone else. Product designs differ, so follow the instructions that came with your own supplies and ask the pharmacy about anything unclear.
The same principle applies to an opened vial or supplies that have been stored outside their packaging. If you can't verify what a product is or how it was handled, a visual inspection won't answer every safety question.
If your friend has unused medicine, suggest that they ask their pharmacy how to handle or dispose of it safely. Used needles and other sharps need an appropriate disposal plan, not a loose trip to the trash.
What if you already accepted or used it?
Be straightforward with a health professional. Tell them the product name, strength, how much was taken if known, when it happened and whether any injection equipment was shared. Bring the packaging or a photo of the label if you can. If a detail is unknown, say that rather than guessing.
For a suspected medication poisoning or dosing mistake in the United States, call Poison Control at 1-800-222-1222 right away; don't wait for symptoms. If someone is unconscious, having trouble breathing or has another life-threatening emergency, call 911.
If an injection device or needle was shared, contact a health professional promptly for individual advice. The team needs the facts to decide what, if anything, should happen next. Their job is to help, not to grade the conversation that led up to it.
Don't take another dose to compensate or start a new product on your own while waiting for advice.
Make the conversation less awkward
A short response can acknowledge the offer and set a boundary: “Thank you for thinking of me. I'm going to check with my pharmacy about my own prescription.” You don't owe a detailed account of your medical history.
If cost or access is the reason the offer is tempting, say that to your care team. Ask about the full cost of care, refill timing and the options available to you. A clear answer may not fix every access problem, but it gives you a safer place to start.
For help preparing a current medication list, read our guide to an interaction review. Your friend's generosity can stay part of the story without their medicine becoming part of your treatment.