Use Sudafed exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. Cold medicine is usually taken only for a short time until your symptoms clear up.
Do not give Sudafed to a child younger than 4 years old. Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children.
Take Sudafed with a full glass of water. Do not crush, chew, or break an extended-release tablet. Swallow it whole. Breaking or opening the pill may cause too much of the drug to be released at one time. You may need to shake the oral suspension (liquid) well just before you measure a dose. Measure the Sudafed liquid with a special dose measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose measuring device, ask your pharmacist for one.
Do not take Sudafed for longer than 7 days in a row. Talk with your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache, cough, or skin rash. If you need surgery, tell the surgeon ahead of time that you are using Sudafed. You may need to stop using the medicine for a short time.
Store Sudafed at room temperature away from moisture and heat.
 Detailed Sudafed Congestion dosage information
What happens if I miss a dose?
Since Sudafed is taken as needed, you may not be on a dosing schedule. If you are taking the medication regularly, take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include feeling restless or nervous.
