Although this new information is somewhat reassuring, men and their doctors should still weigh these issues before committing to long term testosterone therapy. Doctors also watch out for high red blood cell counts, which could increase the risk of clotting. Men can often feel a big difference when they stop therapy because their body's testosterone production has not yet recovered. On treatment, the body stops making testosterone. If a man's testosterone is below the normal range, it's best to repeat it once more to be sure before starting testosterone therapy - often staying on it indefinitely. Just being tired isn't enough to seek testosterone replacement therapy. Such content is not intended to replace an evaluation with a qualified healthcare professional of your choosing and is not intended as medical advice. Testosterone therapy does not appear to increase the risk of prostate cancer, but it can stimulate the growth of prostate cancer cells. In one older study, taking 300 milligrams (mg) of fenugreek twice daily for 8 weeks led to significant increases in testosterone levels in men when combined with resistance training. Always consult a qualified healthcare provider before starting, stopping, or modifying any medical treatment, including testosterone replacement therapy. One of the most common side effects of testosterone therapy is an increase in red blood cell production, known as erythrocytosis. Polycythemia, characterized by an increased concentration of hemoglobin or red blood cells in the bloodstream, is a notable condition that can arise as a side effect of testosterone replacement therapy (TRT). All information is intended for your general knowledge only and is not a substitute for medical advice or treatment for specific medical conditions. It is the one that compounds over time, avoids setbacks from avoidable side effects, and keeps health intact in the process. That means reviewing labs, assessing health history, and building a plan that actually accounts for individual risk rather than applying a generic protocol. The results have been mixed, with some research indicating a higher risk, especially in older men and those with pre-existing heart conditions, while other studies have found no significant increase in cardiovascular risks. While TRT can significantly improve quality of life for men with low testosterone, awareness and proactive management of potential side effects are essential to ensure patient safety and treatment efficacy. Open communication with a healthcare team is essential to navigate the complexities of TRT and to tailor the treatment plan to the individual's needs, minimizing risks while maximizing benefits. Managing these side effects requires a proactive approach, including regular monitoring by healthcare providers, adjustments in therapy dosage or method, and lifestyle changes. Since 2008, there has only been one study that addressed elevated hemoglobin and hematocrit in patients receiving TRT. A meta-analysis of adverse effects of TRT in men with TD found 11 trials that highlighted erythrocytosis as a prominent side effect of TRT. Serum T in the OSA group was significantly lower compared with controls, and a statistically significant inverse correlation was found between serum T level and depressive symptoms Bercea et al. 2013. This study adds to the mounting evidence that suggests TRT may in fact improve LUTS; however, this study is limited in that men with severe LUTS by IPSS and evidence of obstruction were excluded. There was no difference in IPSS scores when adjusted for weight loss during the study period or concomitant use of vardenafil. A recent prospective longitudinal observational registry of 259 men investigated the effects of TRT on LUTS in men with TD Yassin et al. 2014. But that is a diagnostic threshold, not a universal treatment target. The AUA guideline is often cited because it uses a total testosterone below 300 ng/dL as a reasonable diagnostic cutoff for testosterone deficiency. This is why guidelines talk more about physiologic replacement and appropriate monitoring than about one universal "optimal" number. A man using injections measured at trough will not necessarily show the same lab value as a man using transdermal therapy measured under a different protocol. TRT does not cause prostate cancer based on current evidence, but it can stimulate growth of existing prostate tissue. Elevated hematocrit from TRT can increase blood viscosity, raising the risk of deep vein thrombosis (DVT), pulmonary embolism, or stroke. These fluctuations usually stabilize as testosterone levels reach a steady state. However, like any hormone therapy, it carries potential side effects that require awareness and ongoing management. Understanding the potential side effects of testosterone injections and other delivery methods helps you make an informed decision and stay safe throughout treatment. Most mild side effects have resolved or become manageable. Hematocrit begins to rise, which is why most providers order the first follow-up blood panel at this stage. Mood stabilizes as testosterone reaches a more consistent level. Sleep changes and mild headaches may also occur as the body adjusts. The most common early side effects include fluid retention, mild acne, and mood fluctuations. Pellets are implanted under the skin every 3 to 6 months and deliver a steady hormone release.