Tadalista works by increasing blood flow to the penis. This helps men maintain and achieve an erection. It belongs to the group of medications known as phosphodiesterase type 5 inhibitors. Flushing, headaches, lightheadedness, blurred vision, tense muscles, upset stomachs, and rashes are the most common side effects of this medicine. It works quite well, but you have to take it 30 to 60 minutes before doing anything sexual. Do not use this medication if you also use any other nitrate-containing medications. It works by relaxing the blood vessels in your penis, which enhances blood flow to the region during erotic stimulation. This helps maintain and grow a firm, erect penis suitable for sexual activity.