Yes—older men can use tadalafil, and age by itself does not require a lower dose. Clinical trials found no overall difference in safety or effectiveness between older and younger men. However, some older people can be more sensitive to its blood-pressure-lowering effects. D DailyMed +1 If you're referring to Tadalista Professional 20 mg, it contains tadalafil 20 mg. H https://wellonapharma.com/ +1 For an older man, extra caution is important if he has: Heart disease or low blood pressure Kidney or liver problems Takes nitrates (nitroglycerin/isosorbide) — tadalafil must not be combined with these. Takes alpha-blockers or blood-pressure medicines Takes other ED medicines such as sildenafil or vardenafil. D DailyMed Also, 20 mg is an on-demand dose, not a daily dose; daily tadalafil for ED is usually 2.5–5 mg. D DailyMed If you tell me the man's age and the medicines he currently takes, I can check whether tadalafil 20 mg is likely to be appropriate and what interactions to watch for. D H Sources