Concomitant use of DECONDINE with other sympathomimetic agents such as decongestants, tricyclic antidepressants and amphetamine-like psychostimulants or MAO inhibitors which interfere with the catabolism of sympathomimetic amines, may occasionally cause a rise in blood pressure and may diminish the antihypertensive effects of guanethidine, betanidine, methyldopa and reserpine.