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Mucinex Fast-Max Kickstart Severe Cold & Flu & Nighttime Severe Cold & Flu Liquid Medicine, 2x6 fl oz

4.6 stars out of 1758 reviews
(4.6)|
1,758 ratings

Key item features

  • COLD AND FLU MEDICINE FOR ADULTS: Mucinex Fast-Max Kickstart Severe Cold & Flu & Mucinex Fast-Max Night Time Severe Cold & Flu liquids provide powerful multi-symptom relief for your worst cold and flu symptoms.
  • SORE THROAT RELIEF: Both liquids contain Acetaminophen, which helps reduce fever and relieves sore throat, headache, and body pain
  • COUGH MEDICINE FOR ADULTS: Both liquids contain Dextromethorphan HBr which helps suppress and quiet cough
  • CHEST CONGESTION RELIEF: Mucinex Fast-Max Kickstart (Day) contains Guaifenesin, an expectorant, which relieves chest congestion and thins and loosens mucus
  • NASAL DECONGESTANT: Both liquids contain Phenylephrine HCl, a nasal decongestant, which helps relieve stuffy nose, sinus pressure, & nasal congestion
  • ANTIHISTAMINE: Mucinex Fast-Max Night Time contains Triprolidine HCl, an antihistamine, which helps relieve runny nose, sneezing, itchy throat, & watery eyes due to hay fever
  • MUCINEX KICKSTART (DAY) LIQUID: Menthol-flavored cold, flu, & cough medicine provides a cooling sensation & relieves 9 cold and flu symptoms.
  • Mucinex Fast-Max Night Time Severe Cold & Flu provides cold and flu symptom relief to help you get to sleep.
  • #1 TRUSTED BRAND: Mucinex is the #1 Cough & Cold Brand Doctors Trust* and the #1 Pharmacist Recommended Brand† *IQVIA using ProVoice Survey, August 2023. †U.S. News & World Report/Pharmacy Times 2023-2024
  • USAGE: Use as directed; For ages 12+ years
  • FSA & HSA Eligible: Save Up to 30%. Cover out-of-pocket expenses with pre-tax dollars (Product eligibility may vary by plan. Check with your benefits administrator to determine which expenses are eligible before you shop.).
Current price is $22.44$1.87/fl oz
Price when purchased online
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Mucinex Fast-Max Kickstart Severe Cold & Flu & Nighttime Severe Cold & Flu Liquid Medicine, 2x6 fl oz $22.44 $1.87/fl oz

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Mucinex Fast-Max Kickstart Severe Cold & Flu & Nighttime Severe Cold & Flu Liquid Medicine, 2x6 fl oz

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Items may be delivered on different dates

Customer ratings & reviews

4.6 out of 5 stars
stars1,758 ratings273 reviews
How item rating is calculated
  1. 5 stars82% (1,433)
  2. 4 stars9% (162)
  3. 3 stars4% (69)
  4. 2 stars2% (34)
  5. 1 star3% (60)

Reviews summary

Pros
  • : Offers excellent performance at this cost.
  • : Provides relief during illness and helps with recovery.
Cons
  • : Has a strong, unpleasant flavor that some users dislike.
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Showing 1-3 of 273 reviews

Oct 31, 2025
Colem
Walmart Associate
5 out of 5 stars review

Verified Purchase

Must Have!

I buy this for my teenager every season. It helps him sleep at night and stay productive during the day. Any fever, congestion, or mucus build up that he may have, this works well to clear it up. It's a cold and flu season must have that he is always willing to take.

Helpful?4RUDBPEGBK1T2948224596
Nov 2, 2025
SDHB
5 out of 5 stars review

Verified Purchase

Really Kick Starts!

This is the first time we've used the liquid FastMax and it gets into your system FAST! The Kick Start really works and wakes you up to get going with your day. Has a strong menthol taste. The Night Time version is also amazing. We've used FastMax for a long time… it's our go-to, but the liquid version definitely works faster.

Helpful?4RUDBPEGBK1T2948224596
Jan 15, 2026
Melissa
5 out of 5 stars review

Verified Purchase

I have a horrible time finding something that actually helps when I fet a cold/flu, but Mucinex fast-max works everytime. From the first dose until I start feeling better is usually always overnight. It's absolutely a quality product. Wish the taste was a bit better, but they say if it don't taste good it's good for ya!!!!

Helpful?4RUDBPEGBK1T2948224596