If by Filitra 10 you mean the erectile-dysfunction medicine containing vardenafil, the reason vardenafil comes in different strengths is that people can respond differently to the drug and can experience different side effects. Typical strengths are 5 mg, 10 mg, and 20 mg (some products also have 2.5 mg). For most adults, 10 mg is the usual starting dose; it can be lowered to 5 mg or increased to 20 mg depending on effectiveness and tolerability. D DailyMed +1 5 mg: may be appropriate when a lower dose is needed, Filitra 10 for some older adults or people taking certain interacting medicines. 10 mg: standard starting dose for many adults. 20 mg: a higher dose used when 10 mg isn't sufficiently effective and the person can tolerate it. Higher doesn't necessarily mean "better"—it can increase side effects such as headache, flushing, nasal congestion, indigestion, dizziness, or visual disturbances. Also, Filitra is a brand name, so it's worth checking the package to confirm the active ingredient and strength, particularly because medicines sold online can sometimes be mislabeled. If you tell me which doses of Filitra you're seeing (e.g., 10, 20, 40 mg), I can explain what the differences mean and which ones are considered standard.