One vial is easy to track. Two or three, plus a pen and some unopened stock, is where mix-ups start: a use logged against the wrong item, two open vials of the same thing, a spare nobody counted. A few simple habits prevent most of it.
Give every item a clear name
Use a name that tells you which item it is at a glance. Use the same name on the item, in your log and in any reminder. Short, plain names work best.
- Vial A, Vial B
- Morning vial, Evening vial
- Daily pen, Weekly pen
- Spare 1, Spare 2 for unopened stock
Avoid names that only make sense today, like “new one” or “the other vial”. In two weeks they will not. Write the name and the date opened on the item itself. A small sticker or a strip of tape is enough.
Keep one open item at a time
For each thing you use, keep one item open and the rest sealed. Two open vials of the same thing split your uses across both, and the count for each becomes a guess.
Finish the open one before you open the next, unless your label or prescriber says otherwise. When you open a new one, record it as a new item with its own total and open date, and mark the old one as finished. Do not carry the old count over.
Log every use to the right item
Each log entry should name the item it came from. A log that just says “used one” is no help once there are three things on the shelf.
- Log right after the use, while you still know which item you used.
- Check the name on the item before you log, not after.
- If you log to the wrong item, fix it right away. A correction left for later is easy to forget.
- Keep vials and pens in separate sections of your log, since they are counted differently.
Track unopened stock separately
Unopened stock is not in use, so it has no uses logged against it. Track it as a simple count: how many spares you have of each item, and the expiry date of each one.
| Morning vial (open) | 1.2 mL left ÷ 0.1 mL per use = 12 uses |
|---|---|
| Evening vial (open) | 0.8 mL left ÷ 0.2 mL per use = 4 uses |
| Daily pen (open) | 5 uses left |
| Spare vials, unopened | 2 |
| Spare pens, unopened | 1 |
Laid out like this, the shelf tells you which item runs out first. In this example, the Evening vial needs attention before the others, even though it is not the one with the least liquid in it.
Example numbers only. Every total and amount per use comes from your own label and your prescriber's instructions.
Do a short weekly check
Once a week, take two minutes to make sure your records still match the shelf.
- Match each open item to its entry in your log.
- Compare the count in your log with what you can see.
- Count your unopened stock and check each expiry date.
- Note which item runs out first, and when you need to reorder it.
If something does not match, look for a use logged to the wrong item first. On a shelf with several things on it, that is the most likely cause.
Doing it in an app or on paper
On paper, give each item its own card or page with its name, total, open date and one line per use. Keep stock on a separate list. It works, but keeping several cards current and redoing the math for each one takes care.
An app keeps each vial and pen as its own record. In PeptidePal, you name each item, log each use to it, and see doses left and the run-out date for each item, with pens on their own tab and unopened stock counted separately. Undo is there if you log to the wrong one.
The system is what prevents mix-ups: clear names, one open item and a log entry for every use. The tool just makes it easier to keep.
Questions
Can I have two open items at once?
If they are different things, yes, as long as each has its own name and log. For the same thing, one open at a time keeps the count clear.
What if I logged a use to the wrong item?
Remove it from the wrong item and log it to the right one as soon as you notice. Then check that both counts look right.
How should I name two items that are the same?
Add a number or the open date, like Vial A 1 and Vial A 2, or Vial A (opened May 3).
Written and reviewed for accuracy by the PeptidePal team at SignalWorks Labs. This guide is general record-keeping help, not medical advice. Follow your prescriber's instructions and the product label. More in the guides or on the support page.