Here are two different schedules for treatment of certain external parasites with Praziquantel. There is no particular preference over one or the other. The schedules extend to 6 rounds, which is the optimum.
A. FIVE DAY ROUNDS
Day 1: Big WC (>50%), add Prazi. Make sure salt is at the appropriate concentration. This is the beginning of Round 1.
Day 5: Big WC (>50%), replace salt, but do not add Prazi. This is the end of Round 1.
Day 6: Big WC (>50%), replace