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This lets you choose which dosing suits your lifestyle needs best. The recommended dose for as-needed Cialis is 10 mg and may be adjusted up or down to a maximum of 20 mg. Another reason not to double your dose is the long lasting effects of Cialis. Cialis also affects PDE11, which is found in tissues in the heart, pancreas, pituitary, skeletal muscles, testes, and corpus cavernosum. If you feel your current dosage isn’t working, there may be options to consider.

All these areas have shown PDE5 activity and are potential target of PDE5i action. Prostate smooth muscle relaxation, detrusor muscle overactivity, and contraction of prostate tissue can be inhibited through cGMP increase achieved by either NO donors or PDE5Is. Additionally, PDE5i (including tadalafil, sildenafil, or the NO donor sodium nitroprusside) have been shown to attenuate α-adrenergic-induced contraction of isolated human prostate tissue. Thus cGMP may contribute to the regulation of prostatic smooth muscle cell contraction.

In the 1-year open label extension study, back pain and myalgia were reported in 5.5% and 1.3% of patients, respectively. Diagnostic testing, including measures for inflammation, muscle injury, or renal damage revealed no evidence of medically significant underlying pathology. Smaller but statistically significant improvement in walk distance was also seen for the 10-mg and 20-mg groups, but not for the 2.5-mg group