Call your doctor if you have any unusual problems while receiving this medication. Testosterone injection may cause other side effects. Testosterone injection may cause the bones to mature more quickly than normal in children who receive the medication.This means that the children may stop growing sooner than expected and may have a shorter than expected adult height. This medication may be prescribed for other uses; ask your doctor or pharmacist for more information. Bleeding, bruising, fibrosis, infections, pellet extrusion, scarring, and subcutaneous nodules may also occur at the injection site. The same cutaneous eruption occurred with each subsequent insertion of testosterone pellets. The skin lesions rapidly resolved with high-potency topical corticosteroid application. A 77-year-old man who was treated with testosterone pellets developed dermatitis consisting of erythematous plaques and patches on both buttocks and thighs within 28 days following the subcutaneous insertion of testosterone pellets. Tell them about other OTC and prescription medications and supplements you’re taking and ask about any possible drug interactions. It’s rare, but the use of topical testosterone can bring on unwanted changes to the breasts. Other symptoms include trouble urinating and blood in the urine. It’s recommended that you rotate the site of application to reduce possible skin irritation. No matter which version you use, make sure it’s completely absorbed into your skin to reduce transfer to others. The application instructions are the same for both testosterone gels and creams. While not as common as gel versions, testosterone creams may also be sold in specialty pharmacies. Testosterone gels are applied directly to your skin, usually in the armpit, upper arm, shoulder, or inner-thigh areas. Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient. Do not inject into an area where the skin is tender, bruised, red, or hard or where you have scars, tattoos, or stretch marks. You can inject testosterone in the left or right side of your stomach except your navel (belly button) and the area 2 inches around it. Always look at testosterone solution before you inject it. Your healthcare provider will show you or your caregiver how to inject testosterone. Do not use more or less of it or use it more often than prescribed by your doctor. When used to treat breast cancer, testosterone works by stopping the release of estrogen. Second, it is difficult to make firm conclusions from these figures as there were no consistent methods of reporting or quantifying adverse cardiovascular events. TRT has been shown to increase serum T to physiologic levels, improve libido, improve erectile dysfunction, improve overall sexual function, increase energy, improve mood, increase bone mineral density, decrease body fat mass, and increase lean body muscle mass Bhasin et al. 2010; Corona et al. 2013. The estimated likelihood of adverse effects of long-term TRT is still essentially unknown, as overall high-quality evidence based upon prospective randomized trials to recommend for or against its use in most men with testosterone deficiency (TD) is lacking. Healthcare providers should remain informed and proactive in discussing the potential for hormone allergies with patients. An understanding of the underlying immune mechanisms involved in hormone allergies is still evolving, and research is ongoing. A testosterone allergy typically involves an immune response where the body mistakenly identifies testosterone or its carriers as harmful substances. Open communication with healthcare providers and vigilant monitoring are essential to maximizing the benefits of TRT while minimizing its risks. A detailed medical history, including any known allergies, should be taken before starting therapy. Understanding the specific components of the TRT formulation can help patients and healthcare providers identify potential allergens and choose an alternative delivery method if necessary. However, such products aren’t intended as a treatment for lower testosterone levels as a result of aging. Testosterone injections increase your testosterone levels. As of January 2014, the FDA stated they are investigating the potential link but have not concluded ‘FDA-approved testosterone treatment increases the risk of stroke, heart attack, or death’. Collectively in these trials, only one case of prostate cancer was observed during the study periods in over 2000 men.