01Once or twice daily
The usual initial adult oral dose of LASIX is 20 mg to 80 mg given as a single dose. Ordinarily a prompt diuresis ensues. Once the single dose that works is found, it is then given once or twice daily, for example at 8 am and 2 pm. That 8 am and 2 pm example is the labelled maintenance clock after the working single dose is known.