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<a href=https://cialisfstdelvri.com/>buy cialis online prescription</a> The mechanism whereby Cialis improves the symptoms of BPH is not clear, but phosphodiesterase-5 also is present in the muscles of the bladder and the prostate, and it has been suggested that the relaxation of these muscles may make the passage of urine less difficult by reducing the pressure in the muscle surrounding the opening to the urethra that controls the flow of urine from the bladder