ease the effect of the decongestant Also, if you are taking one of the combinations containing pseudoephedrine and are also taking: Amantadine (e.g., Symmetrel) or Amphetamines or Appetite suppressants (diet pills), except fenfluramine (e.g., Pondimin) or Caffeine (e.g., NoDoz) or Chlophedianol (e.g., Ulone) or Medicine for asthma or other breathing problems or Medicine for colds, sinus problems,