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Sudafed (pseudoephedrine) and other decongestants can cause erectile dysfunction (ED) in some men. If you are having trouble getting or maintaining an erection while taking Sudafed, your doctor or pharmacist can recommend a different medication.
Therefore, before using Pseudoephedrine, tell your doctor or pharmacist of all the products you use. Taking too much Pseudoephedrine may cause the following: irritability; restlessness; tremor; convulsions; palpitations (throbbing of heart); high blood pressure (hypertension); difficulty with urination.