Silden generally refers to sildenafil citrate tablets and tada generally refers to tadalafil tablets. Comparatively tadalafil tablets are more suitable for the elderly. Sildenafil citrate tablets for elderly people’s medication performance is 65 years of age or older clearance will be reduced, the drug and its metabolites and its metabolites of the drug time area under the curve will be higher than the younger population. The efficacy and safety of tadalafil tablets in clinical use do not differ significantly from those of younger people. Common side effects of both drugs include headache, flushing, dyspepsia, dizziness, and in severe cases dyspnea and angina. Particularly in the elderly, the medication should be monitored carefully. If serious adverse reactions occur, immediate medical attention is required for relief. It should be noted that people who are allergic to the two drugs, as well as people who are taking nitrate drugs are prohibited from taking the two drugs. The drug is a prescription drug, so you need to follow your doctor’s instructions before taking it.