Can allergy medicines cause nipple discharge?

 Yes, medications that contain pseudoephedrine can cause nipple discharge. Pseudoephedrine is a decongestant that is found in many over-the-counter allergy and cold medicines. This type of medication can cause the nipples to excrete a clear or yellow fluid. In most cases, the discharge is not harmful, but it may be a sign of an underlying medical condition and should be discussed with a healthcare provider.