Does Mucinex Fast Max Have Caffeine In It?

In our latest question and answer, the pharmacist discusses whether or not Mucinex Fast Max has caffeine in it.

Apr 04, 2018

John asked

Does Mucinex Maximum Strength Fast-Max have any caffeine at all in it?

Answer

Mucinex Maximum Strength FAST-MAX does not have caffeine in it.

Mucinex Maximum Strength FAST-MAX is an over-the-counter medication that is used to help treat cold and flu symptoms. It is a combination product that contains:

  • Acetaminophen
  • Dextromethorphan
  • Phenylephrine
  • Guaifenesin

Acetaminophen

Acetaminophen is the generic for Tylenol, which is used to help relieve pain and reduce fever.

Dextromethorphan

Dextromethorphan is contained in many cough medications, such as Delsym. It is a cough suppressant.

Guaifenesin

Guaifenesin is the active ingredient in Mucinex. It acts as an expectorant that helps to thin and loosen phlegm and mucus in your chest.

Phenylephrine

Phenylephrine, the active ingredient in Sudafed PE, is used to help relieve symptoms associated with nasal congestion.

There are several different versions of Mucinex Maximum Strength FAST-MAX including daytime and nighttime formulations.

The nighttime formulation of Mucinex Fast Max contains:

  • Acetaminophen
  • Phenylephrine
  • Diphenhydramine

Diphenhydramine, common brand name is Benadryl, is used in place of dextromethorphan and phenylephrine in Mucinex Fast Max. Diphenhydramine is an antihistamine that can make you drowsy, so it can be used to help improve your sleep while you are sick.

Summary

  • No Mucinex Fast Max product contains caffeine.

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