Indirect sympathomimetics: Risk of vasoconstriction and/or hypersensitive episodes.
Dopaminergic ergot alkaloids: Risk of vasoconstriction and/or hypertensive episodes.
Non-selective MAO inhibitors: Hypertensive episodes (inhibition of metabolism of pressor amines. Due to the duration of MAO inhibitors, this interaction is still possible 15 days after the discontinuation of MAO inhibitors.
Vasoconstrictive ergot alkaloids: Risk of vasoconstriction and/or hypertensive episodes.