Periodic liver function tests, lipid panel, hemoglobin and hematocrit (prior to therapy, at 3 to 6 months, then annually); radiologic examination of wrist and hand every 6 months (when using in prepubertal children). Withhold initial treatment with hematocrit >50% (discontinue therapy if hematocrit exceeds 54% [Bhasin, 2010]), hyperviscosity, untreated obstructive sleep apnea, or uncontrolled severe heart failure. Monitor urine and serum calcium and signs of virilization in women treated for breast cancer. Serum glucose (may be decreased by testosterone, monitor patients with diabetes). Evaluate males for response to treatment and adverse events 3 to 6 months after initiation and then annually.
Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.