Following up with a physician is important for men on testosterone therapy.
Generally, these men should have their testosterone levels checked every 3-4 months during the first year. This can be done with a simple blood test.
The best time of day for the blood test depends on the type of therapy being used. For men using a patch, testosterone levels tend to be highest about four to eight hours after application. However, men using gels can usually have their levels checked at any time, since this delivery system tends to keep levels constant throughout the day.
It’s also recommended that men on testosterone therapy periodically have digital rectal exams and PSA (prostate-specific antigen) tests to keep an eye on their prostate health.
Because testosterone therapy can increase red blood cell counts, men should also have their hematocrit and hemoglobin levels checked regularly.