<p>Nortriptyline should not be given with adrenaline, ephedrine, isoprenaline, noradrenaline, phenylephrine, phenylpropanolamine, drugs that are metabolized by CYP4502D6, MAOIs, guanethidine, debrisoquine, bethanidine, clonidine and reserpine etc. Barbiturates may increase the rate of metabolism of nortriptyline.</p>