Ask a doctor or pharmacist before using  4-Way if you are also using any other drugs, including prescription and over-the-counter medicines, vitamins, and herbal products. Some medicines can cause unwanted or dangerous effects when used together. Not all possible interactions are listed in this medication guide.
Ask a doctor or pharmacist if it is safe for you to use 4-Way if you are also using any of the following drugs:
other decongestants;
an antidepressant;
blood pressure medication; or
diabetes medication.
This list is not complete. Other drugs may interact with phenylephrine nasal, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
 4 Way Fast Acting Nasal Spray drug interactions (more detail)
