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Sudafed PE Sinus Congestion Daytime/Nighttime

Generic name: diphenhydramine and phenylephrine

Brand names: Benadryl Allergy Plus Congestion, Children's Allergy Plus Congestion, Children's Triacting Night Time, Kindermed Kids' Night Time Cold and Cough, Sudafed PE Sinus Congestion Daytime/Nighttime, Dimetapp Nighttime Cold & Congestion, Dytan-D

Used for common cold
Last updated November 3, 2026 0 views
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What is Sudafed PE Sinus Congestion Daytime/Nighttime?

Diphenhydramine is an antihistamine. Phenylephrine is a decongestant.

Sudafed PE Sinus Congestion Daytime/Nighttime is a combination medicine used to treat runny or stuffy nose, sneezing, itching, watery eyes, and sinus congestion caused by allergies, the common cold, or the flu.

Sudafed PE Sinus Congestion Daytime/Nighttime may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Sudafed PE Sinus Congestion Daytime/Nighttime?

Use exactly as directed on the label, or as prescribed by your doctor. Cold or cough medicine is only for short-term use.

Always follow the instructions on the medicine label when giving cough or cold medicine to a child. Do not use the medicine just to make a child sleepy. Death can happen from the misuse of cough or cold medicines in very young children.

Ask a doctor before giving the medicine to a child.

Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

Call 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 or medical tests, tell the doctor in advance if you have taken a cold medicine within the past few days.

Store at room temperature away from moisture and heat.

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Warnings

Do not use Sudafed PE Sinus Congestion Daytime/Nighttime if you have taken an MAO inhibitor in the past 14 days. This could cause a dangerous drug interaction. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine, among others.

Use this medicine exactly as instructed. Taking too much diphenhydramine can cause serious heart issues, seizures, coma, or death.

Do not use this medicine to make a child sleepy. Consult a doctor before giving the medicine to a child younger than 6 years old.

Consult a doctor or pharmacist before using any other medicine that may contain diphenhydramine. Taking too much of this medicine can lead to a fatal overdose.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

Do not use Sudafed PE Sinus Congestion Daytime/Nighttime if you have taken an MAO inhibitor in the last 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine, among others.

Ask a doctor or pharmacist if it is safe to use Sudafed PE Sinus Congestion Daytime/Nighttime if you have ever had:

  • asthma or COPD, a cough with mucus, or a cough from smoking, emphysema, or chronic bronchitis;
  • high blood pressure or heart disease;
  • an enlarged prostate or problems with urination;
  • glaucoma;
  • diabetes; or
  • a thyroid disorder.

This medicine may contain phenylalanine. Check the medication label if you have phenylketonuria (PKU).

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

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Sudafed PE Sinus Congestion Daytime/Nighttime side effects

Get emergency medical help if you notice signs of an allergic reaction: hives; trouble breathing; swelling of your face, lips, tongue, or throat.

Stop using Sudafed PE Sinus Congestion Daytime/Nighttime and call your doctor immediately if you experience:

  • severe drowsiness;
  • sleeplessness;
  • painful or difficult urination;
  • fast, pounding, or uneven heartbeats;
  • trouble breathing;
  • anxiety, nervousness;
  • a seizure; or
  • problems with balance or speech.

Common side effects of Sudafed PE Sinus Congestion Daytime/Nighttime may include:

  • dizziness, drowsiness, headache;
  • dry mouth, nose, or throat;
  • nausea, vomiting, constipation;
  • blurred vision; or
  • trouble sleeping.

This is not a complete list of side effects and others may occur. Contact your doctor for medical advice about side effects. You can report side effects to FDA at 1 800 FDA 1088.

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What happens if I miss a dose?

Since Sudafed PE Sinus Congestion Daytime/Nighttime is taken as needed, you might not have a regular dosing schedule. If you miss a dose and it is almost time for your next dose, just skip the missed dose. Do not take two doses at the same time.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of diphenhydramine and phenylephrine can be fatal.

Overdose symptoms may include vomiting, confusion, severe drowsiness, ringing in your ears, no urination, very dry eyes and mouth, dilated pupils, fast heartbeats, tremor, agitation, hallucinations, or seizure.

Avoid driving or doing anything dangerous until you know how Sudafed PE Sinus Congestion Daytime/Nighttime will affect you. Your reactions could be impaired.

Ask a doctor or pharmacist before using any other medicine that may contain diphenhydramine. This includes medicines for sleep, cold/allergy symptoms, or anti-itch medicine used on the skin. Using too much diphenhydramine may lead to a fatal overdose.

Drinking alcohol with this medicine can cause side effects.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Sudafed PE Sinus Congestion Daytime/Nighttime?

Ask a doctor or pharmacist before using Sudafed PE Sinus Congestion Daytime/Nighttime with any other medicines, especially those that can cause drowsiness (like opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures). Inform your doctor about all your current medicines and any medicine you begin or stop using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.