or night. tell your doctor about all your medical conditions and medicines, and ask if your heart is healthy enough for sex. do not take cialis if you take nitrates for chest pain as it may cause an unsafe drop in blood pressure. do not drink alcohol in excess. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, get medical help right away for an erection lasting more than four hours. if you have any sudden decrease or loss in hearing or vision or any symptoms of an allergic reaction stop taking cialis and get medical help right away. ask your doctor about cialis for daily use and a free 30-tablet trial. bring us your baffling. bring us your audacious. we want your daydreams your ah-has, your easier-said-than-dones. we want your sticky notes, sketchbooks, and scribbles. let's pin 'em to the wall. kick 'em around. kick 'em around, see what happens. bring us your need-it-done-yesterdays. your impracticals, your how-do-we-do-thats, impossibles, your what-do-we-do-nows, downright inaccessibles.