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• Evaluate formulation-specific adverse effects at each visit:
- Intramuscular injections of testosterone enanthate and cypionate: Ask about fluctuations in mood or libido.
- Testosterone patches: Look for skin reaction at the application site.
- Testosterone gels: Advise patients to cover the application sites with a shirt and to wash the skin with soap and water before having skin-to-skin contact because testosterone gel leaves a residue on the skin that can be transferred to a woman or child who comes in close contact. Serum testosterone levels are maintained when the site is washed 6 hours after applying the gel.