This planner handles the logistics of a course that a prescriber has already defined: how many injections it involves, how much product it needs, how many vials to have on hand, and when it ends. It accounts for the beyond-use date printed on a mixed vial, which often limits how long a vial can be used before the medicine runs out. It does not design courses or suggest doses.
Total injections = weeks × injections per week. A vial can run out two ways: the medicine is used up, or the beyond-use date on the mixed vial passes. The planner computes both limits and uses whichever comes first. Doses per vial by contents = vial micrograms ÷ dose. Doses per vial by date = the beyond-use days × injections per week ÷ 7. Vials needed = total injections ÷ doses per vial, rounded up.
Once a vial is mixed or punctured, the clock starts. The beyond-use date comes from the pharmacy that prepared it or the product labeling, and it is often the real limit on a low-frequency schedule. A weekly injection from a vial that must be used within 28 days gets at most four uses, however much is left. Planning around that avoids running short or using a vial past its date.
Suppose a prescriber sets 500 mcg three times a week for 8 weeks, from a 5 mg vial with a 28-day beyond-use date. That is 24 injections and 12 mg in total. By contents, a vial holds 10 doses; by date, it allows 28 × 3 ÷ 7 = 12. The contents limit applies, so the course needs 3 vials and 3 mg is left over. These numbers are illustrative only.
This page used to generate "personalized protocols" with doses and cycle lengths from a short questionnaire. For approved medicines that is the prescriber's job, and for unapproved peptides there are no established human doses to draw on. We replaced it with this planner, which only works from a plan you already have. Each compound's regulatory status and evidence is in the Peptide Guide.
Reconstitution calculator · Course planner · Weight-based dose calculator · Peptide Guide