erectile dysfunction
"I am 55 years old. Began taking Cialis at doctors suggestion due to side effects with Viagra (smashing headaches). Began taking 10mg Cialis every three days and found it to be very effective with no side effects. After six days of use I developed lower back pain and transient pains/aches in lower legs. Tolerable; but not fun to deal with. May switch from continuous use to use as needed or switch to the 5mg dosage. Very effective."