Sudafed (pseudoephedrine) is an over-the-counter medication that can help relieve nasal congestion and sinus pressure due to the common cold, hay fever, or upper respiratory allergies. It works by tightening blood vessels in the nose and sinuses. Sudafed is also available in combination medicines that contain acetaminophen and other pain relievers.
The dosage for sudafed depends on your age and condition. Always read the instructions on your prescription or medicine label. Do not take more than the recommended daily dose. Overdose can cause severe side effects, including seizures and death in children. This medication can cause drowsiness. Avoid driving or operating heavy machinery if you are taking this drug. Do not take Sudafed before bedtime, as it may prevent you from falling asleep.
If you are taking any other medications, check with your doctor or pharmacist before you take Sudafed. You should not take Sudafed if you are taking monoamine oxidase inhibitors (MAOIs, such as isocarboxazid [Marplan] or venlafaxine [Effexor]) or other drugs that affect the brain and nervous system. Also, avoid taking this medicine within two weeks of any other decongestants.
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