Sildenafil tablets and tadalafil tablets are both medications for erectile dysfunction, each with its own characteristics, relatively speaking, tadalafil adverse reaction incidence is a little smaller than sildenafil, but because each person’s tolerance of the drug is different, so the specific choice of what kind of drug depends on the patient’s needs. Overall, the side effects of tadalafil tablets are small, and its common side effects include headache, facial flushing, myalgia, dyspepsia, etc. However, these side effects are mild and transient, and usually do not require special treatment, and can be relieved on their own, and the side effects of sildenafil are more than those of tadalafil. Do not take sildenafil tablets and tadalafil tablets if refractory arrhythmia, angina pectoris, or severe hypotension occurs within 3 months. Sildenafil tablets are short-acting drugs and tadalafil tablets are long-acting drugs. Sildenafil tablets are best effective within 4 hours after taking them and can remain effective for 8 hours, while tadalafil tablets are best effective within 28 hours after taking them and are effective for 36 hours after taking them.