Den sædvanlige dosis er 1 tablet 200 mg i de første 14 dage af behandlingen (denne optrapningsfase har vist sig at mindske forekomsten af hududslæt) herefter tages 1 tablet 200 mg to gange daglig.
The usual dose is one 200 mg tablet for the first 14 days of treatment (this'lead in 'period has been shown to lower the incidence of skin rash) followed by one 200 mg tablet twice daily.