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This is the decoder ring for a typical sermorelin injection instruction — what "subcutaneous" means, how the units and ml relate, the 30-day vial rule, and why you may have received more than one vial.
Key Takeaway
what "subcutaneous" means
Sermorelin is given subcutaneously — into the soft, fatty layer just under the skin, not into muscle. The usual spots are the belly (a couple inches from the navel), the front of the thigh, or the back of the upper arm. Rotating where you inject each time keeps any one area from getting sore.
reading the dose: units and ml are the same thing
This part looks confusing but isn't. Instructions usually list the dose two ways at once — for example, "inject 0.1 ml (10 units)." Those aren't two different amounts. On an insulin syringe, the 10-unit line is the same fill level as 0.1 ml — "units" are the marks printed on the syringe, and "ml" is the actual volume. You draw up to the line your instructions name, and you've measured both at once.
The numbers above are only an example to show how the two-number notation works — your real numbers are on your prescription.
the evening rhythm
Sermorelin is typically taken in the evening before sleep, matching your body's natural overnight rhythm. Your instructions tell you how many nights per week. If it's five, that's five nights on and two off — and the off-nights can be whichever are easiest for you (many people just skip the weekend). Follow the schedule on your prescription.
the 30-day vial rule
Here's the rule that surprises people: once you first puncture a vial with a needle, it's good for 30 days — then you discard it and open a fresh one, even if there's still plenty of liquid left.
- The moment you first use a vial, write that date on it. - Use that vial until the 30-day mark, then throw it out and start the next one.
The 30 days is about keeping the medication sterile after the seal is broken — not about the vial running empty.
why you received more than one vial
Each vial holds far more than a month's worth — but because you toss it at 30 days, you only get through part of it before it's time to open the next. So if you received three vials, they're meant to be used one per month:
- vial 1 → month 1 - vial 2 → month 2 - vial 3 → month 3
That's a full quarter until your next refill. The short version: one vial a month, discard at 30 days no matter how full it looks.
your exact dose lives in your patient portal
Everything above is the general "how to read it." Your specific dose, nights per week, form, and any notes from your prescriber are in your patient portal and on your prescription label. If anything here doesn't match what's there, follow your prescriber and pharmacy — and bring them any questions about your case.
Frequently asked questions
It says 0.1 ml and also 10 units — which do I use?
Both — they're the same amount written two ways. On an insulin syringe, draw up to the line your instructions name; the 10-unit mark is the same fill level as 0.1 ml.
What if I miss an evening?
Don't double up to make up for it. Follow the schedule your prescriber gave you, and ask them if you're unsure how to handle a missed night.
The vial still looks full at 30 days — do I really discard it?
Yes. The 30-day limit is about keeping the medication sterile once the vial has been punctured, not about how much is left inside.
Editorial & medical disclaimer
This article is published by the Pepvio editorial team for informational purposes only. It is not medical advice, diagnosis, or treatment, and it has not been reviewed by a licensed clinician. The information presented draws on published research but should not substitute for professional medical guidance. Pepvio protocols require a prescription from a licensed healthcare provider. Individual results vary. Always consult your physician before starting any new treatment protocol. Pepvio does not claim that any product cures, treats, or prevents any disease.
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