TRT injection schedules: weekly vs twice weekly vs daily
The amount of testosterone you inject each week sets your average level. How you split it up sets how far your level rises and falls around that average. That's why many people on TRT move from one weekly injection to two smaller ones, or to small daily or every-other-day shots.
Note: this is general information, not medical advice. Your dose and how often you inject are for you and your prescriber to decide.
Why levels rise and fall
Testosterone cypionate and enanthate are esters: the testosterone is released slowly from the oil you inject, and then cleared by your body. The half-life is how long it takes for half of a dose to be gone: about 8 days for cypionate (the figure on the Depo-Testosterone label) and 4–5 days for enanthate.
Right after an injection your level is at its highest. It falls until the next one, then jumps again. The longer the gap compared with the half-life, the deeper the dip before the next dose.
The same weekly dose, split four ways
These numbers come from a simple half-life model (the same one in our levels calculator). They show how far the lowest point sits below the highest once your levels have settled. The weekly total and the average are the same in every row.
| Schedule | Testosterone cypionate (8 days) | Testosterone enanthate (4.5 days) |
|---|---|---|
| Once a week | low is about 45% below the peak | low is about 66% below the peak |
| Twice a week (every 3.5 days) | about 26% below | about 42% below |
| Every other day | about 16% below | about 27% below |
| Every day | about 8% below | about 14% below |
So splitting a weekly cypionate dose into two injections roughly halves the swing, and daily injections make it close to flat. Enanthate swings more on every schedule because it clears faster.
Tip: put your own dose, schedule and half-life into the levels calculator to see the chart and the same table for you.
What the swing can mean
A bigger swing means higher peaks and lower troughs. Some people notice the end of the week: energy, mood or libido dropping before the next shot. Higher peaks can also mean more conversion to oestradiol and, for some, a bigger effect on haematocrit. Splitting the dose is one of the things prescribers commonly adjust when that happens, but it's a decision to make with yours, using your symptoms and blood tests.
Which schedule suits you
- Once a week: the fewest injections. The biggest swing, especially with enanthate.
- Twice a week: a common middle ground. Monday and Thursday, or every 3.5 days.
- Every other day or daily: the flattest levels. Small volumes, often given subcutaneously with an insulin syringe (subQ vs IM). More injections to remember.
Whatever you choose, consistency matters more than the exact day. A late or missed dose has the same effect as a longer gap.
When to have bloods taken
Because your level moves through the week, the day of your blood test changes the number. Most prescribers ask for a trough: just before your next injection. See when to time blood tests on TRT.
Keeping track
Changing schedule takes about five half-lives to fully settle: roughly 6 weeks for cypionate. Logging each injection, with the time, makes it much easier to see what changed and to time your next blood test properly.
General information, not medical advice. Your prescriber sets your dose and schedule.
Track it without the spreadsheet
Enhanced Training Studio schedules every injection, shows what to draw, rotates your sites and estimates your levels. The protocol tracker is free, needs no account and keeps everything on your phone.
See the TRT tracker Levels calculator