Do not split a 20 to make 10
These film-coated tablets are not a licensed split on this board. If the script says 10 mg, fill a 10 mg tablet.
A 20 mg tablet taken as 'two 10s' is a double dose if 10 mg already went down.
Which four film-coated tablets exist?
2.5 mg, 5 mg, 10 mg, and 20 mg. Those are the labelled swallow strengths.
A window that only stocks 20 mg cannot legally invent the other three by snapping the tablet on this board.
Who is handed 2.5?
Men on ritonavir or cobicistat (2.5 mg in 72 hours) and men on the strong-inhibitor 24-hour list. Also the alpha-blocker open when those inhibitors are present.
That floor is the CYP scan, not a starter joke.
20 mg is the labelled ceiling
Maximum recommended dose is 20 mg, once per day, for adults who may climb. Child-Pugh B stops at 10 mg.
Higher exposure is not a shorter Tmax. Clock talk stays on the onset board.
Who usually opens on 10?
Most adults without the special-population cuts. About 60 minutes before sex, once per day.
The start page is 10 mg, then 20 or 5.
Who opens on 5?
Age 65 and older (consider 5 mg). Child-Pugh B (start 5, max 10). Stable alpha-blocker therapy (initiate 5 mg).
Three different reasons, one tablet. Do not merge them into a single 'low dose' slogan.