16 years and over: 2 tablets dissolved in at least half a tumbler of water every 4-6 hours up to 4 times daily. No more than 8 tablets in 24 hours. 12-15 years: 1 tablet dissolved in at least half a tumbler of water every 4-6 hours up to 4 times daily. No more than 4 tablets in 24 hours. Under 12 years: not to be given