There are numerous testosterone formulations now available, and patients and clinicians should take into account the "4 Cs": cost, compliance, convenience, and concentration levels. Testosterone is a natural contraceptive and should not be used in men trying to achieve a pregnancy. All testosterone gels and solutions have an increased risk of transference, and there should be increased caution when in contact with children and pregnant women.
Keywords: Androgens; Formulations; Gels; Testosterone; Therapies.
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