The potential for pharmacokinetic interactions between moxonidine and digoxin at steady-state was investigated in 15 healthy male volunteers. Multiple oral doses of 0.2mg moxonidine twice daily and 0.2mg digoxin once daily were administered alone and in combination in a randomised 3-period crossover design. The drugs were administered for at least 5 days.The results indicate that neither moxonidine nor digoxin influences the pharmacokinetics of the other drug under steady-state conditions.