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Mucinex Fast-Max Night Time Cold and Flu

Generic name: acetaminophen, diphenhydramine, and phenylephrine

Brand names: Children's Delsym Cough Plus Cold Night Time, Children's Dimetapp Multi-Symptom Cold and Flu, Children's Mucinex Night Multi-Symp Cold, Delsym Cough Plus Cold Night Time, Mucinex Children's Multi-Symptom Cold Nighttime Very Berry, Mucinex Fast-Max Night Time Cold and Flu, Robitussin Maximum Strength Severe, Sudafed PE Severe Cold, Theraflu ExpressMax Nighttime Severe C and C, Theraflu PowerPods Nighttime Severe Cold, Theraflu Severe Cold and Cough Nighttime

Used for sore throat
Last updated November 2, 2026 0 views
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What is Mucinex Fast-Max Night Time Cold and Flu?

Acetaminophen is used to relieve pain and reduce fever. Diphenhydramine is an antihistamine that helps with allergies. Phenylephrine is a decongestant that helps with nasal congestion.

Mucinex Fast-Max Night Time Cold and Flu is a combination medicine that treats cold and flu symptoms like runny or stuffy nose, sneezing, cough, sore throat, headache, fever, and body aches.

There are many brands and forms of acetaminophen, diphenhydramine, and phenylephrine available. Not all brands are included in this leaflet.

Mucinex Fast-Max Night Time Cold and Flu may also be used for other purposes that are not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Mucinex Fast-Max Night Time Cold and Flu?

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

Do not take more of this medicine than is recommended. An overdose of acetaminophen can harm your liver or cause death. Taking too much diphenhydramine can result in serious heart issues, seizures, coma, or death.

Some brands of Mucinex Fast-Max Night Time Cold and Flu are not approved for anyone younger than 12 years old.

Always follow the directions on the medicine label about giving this medicine to a child. Do not use the medicine just to make a child sleepy. Death can happen from the misuse of antihistamines in very young children.

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

Dissolve one packet of the powder in at least 4 ounces of water. Stir this mixture and drink all of it right away.

Call your doctor if you still have a sore throat after 2 days, or if you also have a fever, headache, nausea, vomiting, or rash.

Stop taking this medicine and talk with your doctor if you still have a fever after 3 days, or if you still have pain, a stuffy nose, or a cough after 7 days (5 days if treating a child). Also call your doctor if your symptoms worsen, or if you have any redness or swelling.

If you need surgery or medical tests, tell the surgeon or doctor in advance if you have taken this medicine in the past few days.

Store at room temperature, away from moisture and heat.

This section was rewritten for readability and reviewed for meaning.

Warnings

Do not use this medicine if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.

Use this medicine exactly as directed. Taking too much acetaminophen can harm your liver or cause death. Taking too much diphenhydramine can result in serious heart issues, seizures, coma, or death.

Do not use this medicine to make a child sleepy. Some versions of Mucinex Fast-Max Night Time Cold and Flu are not approved for anyone younger than 12 years old.

Drinking alcohol may raise your risk of liver damage while using acetaminophen.

Stop taking this medicine and contact your doctor immediately if you notice skin redness or a rash that spreads and causes blistering and peeling.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

Ask a doctor before taking medicine that contains acetaminophen if you have ever had liver disease, or if you drink more than 3 alcoholic beverages per day.

Do not use this medicine if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.

Ask a doctor or pharmacist if this medicine is safe to use if you have ever had:

  • asthma or COPD, cough with mucus, or cough caused by smoking, emphysema, or chronic bronchitis;
  • liver disease;
  • high blood pressure, heart disease;
  • an enlarged prostate or urination problems;
  • a thyroid disorder;
  • diabetes;
  • glaucoma; or
  • a condition for which you take warfarin (Coumadin, Jantoven).

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

This section was rewritten for readability and reviewed for meaning.

Mucinex Fast-Max Night Time Cold and Flu side effects

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

In rare cases, acetaminophen may cause a severe skin reaction that can be fatal. This could happen even if you have taken acetaminophen before without any problems. Stop taking this medicine and call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling. If you have this type of reaction, you should never take any medicine that contains acetaminophen again.

This medicine may cause serious side effects. Stop using this medicine and call your doctor right away if you have:

  • severe drowsiness;
  • painful or difficult urination;
  • dizziness, trouble sleeping, nervousness; or
  • liver problems--loss of appetite, stomach pain (upper right side), tiredness, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Common side effects of Mucinex Fast-Max Night Time Cold and Flu may include:

  • drowsiness;
  • dry eyes, blurred vision;
  • dry mouth, nose, or throat;
  • constipation; or
  • feeling restless or excited (especially in children).

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

This section was rewritten for readability and reviewed for meaning.

What happens if I miss a dose?

Since Mucinex Fast-Max Night Time Cold and Flu is taken as needed, you might not have a regular dosing schedule. If you miss a dose and it is nearly time for your next dose, skip the missed dose. Do not take two doses at once.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical help or call the Poison Help line at 1-800-222-1222. Taking too much can be fatal or cause liver damage.

Signs of an overdose may include loss of appetite, vomiting, weakness, confusion, ringing in your ears, upper stomach pain, dark urine, not urinating, very dry eyes and mouth, yellowing of your skin or eyes, dilated pupils, fast heartbeats, tremors, agitation, hallucinations, or seizures.

Avoid driving or doing anything dangerous until you know how this medicine will affect you. Your reactions may be affected.

Talk to a doctor or pharmacist before using any other medicine that may have acetaminophen or diphenhydramine. This includes medicines for pain, fever, swelling, cold/flu symptoms, or anti-itch creams. Using too much acetaminophen or diphenhydramine can lead to a fatal overdose.

Drinking alcohol may increase your risk of liver damage while taking this medicine.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Mucinex Fast-Max Night Time Cold and Flu?

Ask a doctor or pharmacist before using Mucinex Fast-Max Night Time Cold and Flu 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 the medicines you are currently taking and any new ones you start or stop. 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.