day or night. tell youdoctor abo all your medical contions and medicines, and ask if your heart is healt enough for sex. do not take cialis if you take nitrates for chest in, or adempas for pulmonary hypertension, as it may cause an unsafe drop in blood presre. do n drink aohol in n ss. side effects may include headache, upset stomach, delayed backache or mu ache. to avoid long-rm injury, get medil lp right away for anrection lasting more than four hours. if you have any sudden decrease, or symptoms of anllergic reaction, stop taking alis and get medical help right away. or symptoms of anllergic reaction, ask ur doctor about cialis for daily use. many men aren t awe theihealth insurce y cover cialis. contact yo health plan fothe latest information.