Mucinex Fast-Max Kickstart Adult Liquid Cold & Flu Treatment - 6oz: 1-Pack, With Acetaminophen
$13.99 ($2.33/fluid ounce)
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4.4 out of 5 stars with 204 reviews
quality: 3.31 out of 5
value: 3.38 out of 5
55% would recommend
18 recommendations
5 out of 5 stars
5 February, 2026
originally posted on Mucinex
THIS STUFF WORKS
I do not get sick very often however when I do it always seems to hit hard. My go to meds are usually Mucinex. I had never tried the Kick Start one until yesterday. It works good and I am able to function to some degree after taking it. I have noticed it lasts until and if not a little more than the next dose directed time frame. It has allowed me to rest and sleep through the severe symptoms prior to taking it I couldn't do either.
2 out of 5 stars
Thumbs down graphic, would not recommend
2 November, 2025
SCAM
i hate that phenylephrine has been proven ineffective orally and is still put on bottles of medicine like it is - total SCAM
1 reply from Mucinex Team team - 5 months ago
Thank you for your feedback regarding our Mucinex® product. We would like to learn more about your experience. When you have a chance, please call us at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number 7483244, and we would be happy to assist you further.
5 out of 5 stars
29 September, 2025
originally posted on Mucinex
Fast acting
I got this because I know liquid works faster than pills and it taste horrible but works great! Mom always said if it taste bad it usually works wonders
1 reply from Mucinex® Consumer Care team - 6 months ago
Thank you for your feedback regarding our Mucinex® product. We'd love to learn more about your experience. When you have a chance, please call us at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number RB0007296107, and we would be happy to assist you further.
5 out of 5 stars
Thumbs up graphic, would recommend
25 April, 2025
Fast acting cold medicine
Got this for my mom, who had a viral infection. Nothing else was really working for her that she got from the doctor in fact she started feeling worse, so went out and bought this, and it started to work immediately she definitely sounded much better the next morning. Would get this again!
5 out of 5 stars
15 January, 2025
originally posted on influenster.com

Wish I had more of it right now lol
[This review was collected as part of a promotion.] Mucinex Fast-Max Kickstart Cold and Flu Medicine works really well for colds and flu. It helps with symptoms fast, like sore throat and congestion. The berry flavor is nice and it's not too difficult to get down. It's a good value for the price, and it really gets the job done. I felt better quickly after using it.
2 out of 5 stars
Thumbs down graphic, would not recommend
15 January, 2025
Tastes and burns like mouthwash
I normally just get the mucinex gel capsules when I am sick. But I decided to try this because I heard the liquid is more effective. This tastes and feels like mouthwash in your mouth. It is the worst thing I have ever taken. It has made me want to throw up. I have only taken it twice but haven't noticed any difference in my cough either. I would not buy this again. I am not sure how their other liquid cough medicines compare but this makes me afraid to try them
1 reply from Mucinex Team team - 1 year ago
We are sorry to learn about your experience with our Mucinex® Fast-Max® Kickstart Severe Cold & Flu liquid. We would like the opportunity to speak with you personally. Please call us at your convenience at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number 5950619, and we would be happy to help.
5 out of 5 stars
1 January, 2025
originally posted on Mucinex
My preferred cough syrup
I feel it working. The menthol makes me feel like I’m breathing more freely. I prefer the menthol flavor. It masks the bitter taste of the medicine.
1 out of 5 stars
Thumbs down graphic, would not recommend
30 December, 2024
Did not help
This stuff tastes awful and I don't think it actually help with anything. I felt exactly the same whether or not I took it.
1 reply from Mucinex Team team - 1 year ago
Hi Adrienne. We are sorry to learn about your experience with our Mucinex® Fast-Max® Kickstart Severe Cold & Flu liquid. We would like the opportunity to speak with you personally. Please call us at your convenience at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number 5885543, and we would be happy to help.
5 out of 5 stars
21 December, 2024
originally posted on Mucinex
It works
Works great doesn’t taste well but it’s worth it so definitely give it a try
1 reply from Mucinex® Consumer Relations team - 1 year ago
Thank you for your feedback regarding our Mucinex® product. We'd love to learn more about your experience. When you have a chance, please call us at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number RB0005831633, and we would be happy to assist you further.
5 out of 5 stars
15 October, 2024
originally posted on influenster.com

The most important thing for me was how quickly Mucinex Fast-Max Kickstart relieved my cold and flu symptoms, helping me feel better fast.
[This review was collected as part of a promotion.] Mucinex Fast-Max Kickstart Severe Cold and Flu Medicine worked quickly to relieve my symptoms. It eased my cough, congestion, and body aches, helping me feel better fast. A must-have for tough colds!
5 out of 5 stars
11 October, 2024
originally posted on influenster.com

Maximum Strength Mucinex Fast-Max Kickstart is a must-have for cold and flu season, offering fast, comprehensive relief from severe symptoms with a refreshing menthol kick.
[This review was collected as part of a promotion.] Product Review: Maximum Strength Mucinex Fast-Max Kickstart Maximum Strength Mucinex Fast-Max Kickstart is a powerful remedy for tackling severe cold and flu symptoms. From the moment you take it, the strong menthol flavor and cooling sensation provide immediate relief. It’s highly effective at easing body pain, headaches, fever, nasal and sinus congestion, cough, and sore throat. Versatile for day or night use, this is a go-to solution for fast, comprehensive symptom relief when you need it most.
5 out of 5 stars
13 August, 2024
originally posted on Mucinex
(no review title)
Works great. Will continue even though taste isn't the best... the nighttime one taste a little better! 👍
1 reply from Consumer Relations team - 2 years ago
Thank you for your feedback regarding our Mucinex product. We'd love to learn more about your experience. When you have a chance, please call us at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number RB0005186327, and we would be happy to assist you further.
5 out of 5 stars
19 July, 2024
originally posted on influenster.com

It worked
[This review was collected as part of a promotion.] The flavor was okay, it is cough syrup. The packaging was simple and easy to use. It helped me when I was congested and I will definitely buy it and use it again.
1 out of 5 stars
15 July, 2024
originally posted on influenster.com

Awful taste
[This review was collected as part of a promotion.] It’ taste awful. I wasn’t able to drink it. I can’t say how effective it is. There are too many dyes in it. I received this product from Influenster in exchange for my review.
1 reply from Mucinex Consumer Relations team - 2 years ago
We're sorry to learn about your experience with our Mucinex product. We'd like the opportunity to speak with you personally. Please call us at your convenience at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number RB0005050855, and we would be happy to help.
5 out of 5 stars
12 July, 2024
originally posted on influenster.com

Yes
[This review was collected as part of a promotion.] I got this just in time it was perfect. Just came down with a sickness and I used this and it made me feel so much better. Will always be my go to brand !
5 out of 5 stars
2 July, 2024
originally posted on influenster.com

works great!
[This review was collected as part of a promotion.] Great for when you're not feeling well. Took it and within a hour i started feeling better. Flavor was good and effective at resolving my cough quickly
1 out of 5 stars
Thumbs down graphic, would not recommend
25 June, 2024Verified purchase
OH MY! (SMH)
So to be honest, I don’t know if it works or not —yet, and I don’t care if it does!!! I will NEVER take another dose of that EVER again. I always laugh when people say medicine tastes bad, obviously, it tastes bad—it’s medicine. I’ve never cared what it taste like…as long as it worked. THIS is another story. I took one 20 mL dose as directed. Right away it tasted awful, but I was expecting that. What followed I was NOT EXPECTING! I got an immediate chill, then about 10 seconds later, I started sweating and my stomach started to hurt terribly, I felt very nauseous I got that watery feeling you get when you feel like you’re going to throw up, my head started throbbing, then about 2 minutes later, I had to run to the bathroom. I have no idea what is happening? It’s been 10 minutes since I took it and I’m still burping up that minty chalky taste, which is making me feel nauseous all over again. This is one experience I could’ve done without. Hopefully all this goes away soon. I feel 10 times worse after taking one dose than I did before I took it. I only took it due to chest congestion, (needed an expectorant) coughing, and sinus headache. Again, it’s not been long enough to know if it works, but even if it does, nothing is worth feeling like I feel right now. I’d take my original symptoms any day over what I’m feeling at this moment. I’ve never experienced anything like this. I guess, Be careful! Idk?
1 reply from Mucinex Team team - 2 years ago
We are very sorry to learn about your experience with our Mucinex® Fast-Max® Kickstart Severe Cold & Flu liquid. We would like the opportunity to speak with you personally. Please call us at your convenience at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number 4943676, and we would be happy to help.
5 out of 5 stars
24 June, 2024
originally posted on influenster.com

Works great!
[This review was collected as part of a promotion.] This is the only thing that will help decongest my (15 year old) daughter! It lasts a solid 12 hours and works great! She also does not complain about the flavor.
1 out of 5 stars
Thumbs down graphic, would not recommend
13 June, 2024
Terrible
It's awful. Not only did it barely help with my symptoms but the taste is awful. It feels like you are swallowing chemicals, I could barely drink one dose without gagging.
1 reply from Mucinex Team team - 2 years ago
We are sorry to learn about your experience with our Mucinex® product. We would like the opportunity to speak with you personally. Please call us at your convenience at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number 4865124, and we would be happy to help.
2 out of 5 stars
5 June, 2024
originally posted on influenster.com

Yuck
[This review was collected as part of a promotion.] This stuff tasted so nasty to me. It didn't really give me any relief from a stuffy nose and a head ache. I wouldn't buy this again. Also has a bunch of dyes in it.
1 reply from Mucinex Consumer Relations team - 2 years ago
We are sorry to learn about your experience with our Mucinex product. We'd like the opportunity to speak with you personally. Please call us at your convenience at 1-866-529-8804 between 9:00-5:00 EST (Monday - Friday) and mention the following reference number RB0004838496, and we would be happy to help.