Most trans men on injectable testosterone give themselves a shot every one to two weeks, though the exact schedule depends on the type of testosterone prescribed and how your body responds. The most commonly prescribed forms, testosterone cypionate and testosterone enanthate, are typically dosed at 50 to 200 mg per week or 100 to 200 mg every two weeks. Your provider will set a starting schedule and adjust it based on your blood levels and how you feel between doses.
Standard Injection Schedules
Two short-acting testosterone formulations dominate gender-affirming hormone therapy: testosterone cypionate and testosterone enanthate. Both work the same way. You inject an oil-based solution, and your body absorbs the testosterone gradually over the following days. The standard dosing is 200 mg every two to three weeks, but many providers now prefer splitting that into smaller, more frequent doses, such as 50 to 100 mg per week, to keep hormone levels steadier.
A long-acting option also exists: testosterone undecanoate (sold as Aveed in the U.S. or Nebido internationally). This formulation is given as a larger injection, typically 1,000 mg, that lasts much longer. The schedule starts with a first dose, a second dose six weeks later, and then one injection roughly every 10 to 14 weeks after that. About 70% of patients on this formulation land on an interval somewhere between 10 and 14 weeks. The trade-off is that these injections must be given in a clinical setting rather than at home, and the injection volume is larger.
Weekly vs. Biweekly Dosing
The choice between injecting once a week or once every two weeks matters more than it might seem. Short-acting testosterone creates a spike in blood levels shortly after the injection, then gradually drops until your next dose. When you inject a larger dose every two or three weeks, that peak-to-trough swing is more dramatic. Levels can climb above the normal male range in the first few days and dip below it right before the next shot.
Those swings have real effects. Surveys of trans men and other testosterone users show that people on less frequent, higher-dose injection schedules report significantly more mood swings, increased irritability, and fluctuations in energy and sex drive compared to those using more stable delivery methods. In one Dutch survey, about 25% of users on biweekly short-acting injections experienced noticeable mood swings, compared to roughly 6 to 8% of those on long-acting injections or gels. Splitting the same total dose into weekly injections is one of the simplest ways to smooth out those peaks and valleys.
Subcutaneous vs. Intramuscular Injections
Testosterone injections can be given into muscle (intramuscular, or IM) or into the fat layer just beneath the skin (subcutaneous, or SubQ). Both routes deliver comparable blood levels of testosterone at similar doses, and many providers now offer the subcutaneous option because it’s less intimidating and generally less painful.
The absorption patterns differ slightly. Intramuscular injections rely partly on blood flow through muscle, which increases with physical activity. Subcutaneous injections absorb more slowly and steadily because fat tissue has a more consistent blood supply that doesn’t change much with movement. In practice, this means subcutaneous injections may produce slightly more stable testosterone levels day to day. One study found that subcutaneous testosterone reached its peak concentration in about 8 days, compared to 3.3 days for the same formulation given intramuscularly.
If you and your provider choose the subcutaneous route, a slightly lower weekly dose is typical, often around 75 mg per week of cypionate or enanthate, because the steadier absorption means less testosterone is “wasted” during supraphysiologic peaks. Subcutaneous injections use smaller, shorter needles, and common injection sites include the abdomen and thigh.
What a Typical Start Looks Like
Most providers start at a moderate dose and increase gradually. A common starting point is 50 to 75 mg per week (or the equivalent every two weeks). Starting lower allows your body to adjust and gives your provider time to check blood work before increasing. The goal is to bring your testosterone into the typical male range, generally 300 to 1,000 ng/dL, measured at the lowest point in your cycle, right before your next injection.
Blood tests are usually checked within the first few months of starting, then periodically as your dose stabilizes. Your provider will look at your testosterone level at trough (the day your next shot is due) to make sure it hasn’t dipped too low, and may also check red blood cell counts, liver function, and cholesterol, since testosterone affects all of these. Once you’re on a stable dose, blood work typically moves to every six to twelve months.
Signs Your Schedule Needs Adjusting
Pay attention to how you feel in the last day or two before your next injection. If you notice a consistent pattern of fatigue, low mood, brain fog, or a dip in sex drive right before your shot is due, your trough levels may be dropping too low. This is one of the most common reasons providers adjust an injection schedule.
The fix is usually straightforward: split the same total dose into more frequent injections. For example, if you’re taking 200 mg every two weeks and feeling rough by day 12, switching to 100 mg every week delivers the same amount of testosterone but keeps your levels more even. Some people eventually move to twice-weekly injections for even smoother levels, though this is less common.
On the other end, symptoms like persistent acne, unusual irritability in the days right after your shot, or blood work showing levels well above the male range can signal that your peak is climbing too high. Your provider might lower the dose per injection or spread the same dose across more frequent, smaller shots.
Practical Tips for Self-Injection
Most trans men learn to inject at home after their first few supervised doses. For intramuscular injections, the thigh (specifically the outer middle third) is the most common self-injection site. For subcutaneous injections, the belly or upper thigh works well. Many people use one needle to draw the oil from the vial and swap to a fresh, smaller needle for the actual injection, since puncturing the rubber stopper can dull the tip.
Testosterone in oil is thick, so drawing it into the syringe takes patience. Warming the vial in your hands or running it under warm water for a minute makes the oil flow more easily. Injecting slowly, over about 10 to 15 seconds, reduces discomfort. Rotating injection sites from one side to the other each week helps prevent scar tissue from building up in one spot.
Building a consistent routine helps with adherence. Many people pick the same day each week and set a recurring reminder. Keeping a simple log of the date, dose, and injection site can be useful for tracking patterns if symptoms come up between provider visits.