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Yes: You can take them together. Allegra 24 hour is a nonsedating antihistamine and Sudafed PE is a decongestant. This would be similar to taking allegra D. What you do not want to do is take Allegra D with sudafed, then you would get too much decongestant.Also you want to avoid decongestants if you have certain conditions like hypertension.Also don't take the sudafed at bedtime....Read more.hat you do not want to do is take Allegra D with sudafed, then you would get too much decongestant. Also you want to avoid decongestants if you have certain conditions like hypertension. Also don't take the sudafed at bedtime. ...Read more.
  Yes you can. In fact, pseudoephedrine HCL (the active incgredient in Sudafed) is combined with ibuprofen in many cold and sinus pills, such as AdvilAdvilÂ® Cold & Sinus â¦ [OTC]; DristanÂ® Sinus [OTC]; and MotrinÂ® Cold and Sinus [OTC]. + 110 others found this useful. hope people don't come to you of â¦ ten with these kind of questions. Anyway, if it's just Sudafed (or generic) that contains only pseudoephedrine, yes you can take aspirin. However if it is mix of pseudo' and acetaminophen (which is Tylenol) I wouldn't. It'd be like taking Tylenol, Aspirin AND Sudafed all together.