MUCINEX FAST MAX Liquid Cold and Flu Kickstart and MUCINEX Nightshift Kickstart
Acetaminophen, Dextromethorphan HBr, Guaifenesin, Phenylephrine HCI, Triprolidine HCI · Kit
Active ingredient
KICKSTART SEVERE COLD & FLU: Acetaminophen 650mg.................................Pain reliever/fever reducer Dextromethorphan HBr 20 mg.....................................Cough suppressant Guaifenesin 400 mg........................................................Expectorant Phenylephrine HCl 10mg........................................Nasal decongestant NIGHT TIME SEVERE COLD & FLU: Acetaminophen 650mg............................ ....Pain reliever/fever reducer Dextromethorphan HBr 20 mg....................................Cough suppressant Phenylephrine HCl 10mg................................... . . . .Nasal decongestant Triprolidine HCl 2.5 mg................................................Antihistamine
Purpose
Purposes KICKSTART SEVERE COLD & FLU: Dextromethorphan HBr 20 mg.....................................Cough suppressant Guaifenesin 400 mg........................................................Expectorant Phenylephrine HCl 10mg........................................Nasal decongestant NIGHT TIME SEVERE COLD & FLU: Dextromethorphan HBr 20 mg....................................Cough suppressant Phenylephrine HCl 10mg................................... . . . .Nasal decongestant Triprolidine HCl 2.5 mg................................................Antihistamine
Uses
Uses KICKSTART SEVERE COLD & FLU: temporarily relieves these common cold and flu symptoms: ■ cough ■ nasal congestion ■ minor aches and pains ■ sore throat ■ headache ■ stuffy nose ■ sinus congestion and pressure ■ temporarily reduces fever ■ helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive NIGHT TIME SEVERE COLD & FLU: temporarily relieves these common cold and flu symptoms: ■ cough ■ nasal congestion ■ minor aches and pains ■ sore throat ■ headache ■ sinus congestion and pressure ■ runny nose ■ sneezing ■ itching of the nose or throat ■ itchy, watery eyes due to hay fever ■ temporarily reduces fever ■ controls cough to help you get to sleep
Warnings
Warnings KICKSTART SEVERE COLD & FLU: Liver warning: This product contains acetaminophen. Severe liver damage may occur if you take: ■ more than 6 doses in 24 hours, which is the maximum daily amount ■ with other drugs containing acetaminophen ■ 3 or more alcoholic drinks daily while using this product Allergy alert: Acetaminophen may cause severe skin reactions. Symptoms may include: ■ skin reddening ■ blisters ■ rash If a skin reaction occurs, stop use and seek medical help right away. Sore throat warning: If sore throat is severe, persists for more than 2 days, is accompanied or followed by fever, headache, rash, nausea, or vomiting, consult a doctor promptly. Do not use ■ with any other drug containing acetaminophen (prescription or nonprescription). If you are not sure whether a drug contains acetaminophen, ask a doctor or pharmacist. ■ if you are now taking a prescription monoamine oxidase inhibitor (MAOI) (certain drugs for depression, psychiatric, or emotional conditions, or Parkinson’s disease), or for 2 weeks after stopping the MAOI drug. If you do not know if your prescription drug contains an MAOI, ask a doctor or pharmacist before taking this product. Ask a doctor before use if you have ■ liver disease ■ heart disease ■ diabetes ■ high blood pressure ■ thyroid disease ■ trouble urinating due to an enlarged prostate gland ■ persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema ■ cough that occurs with too much phlegm (mucus) Ask a doctor or pharmacist before use if you are taking the blood thinning drug warfarin When using this product do not use more than directed Stop use and ask a doctor if ■ nervousness, dizziness, or sleeplessness occur ■ pain, nasal congestion, or cough gets worse or lasts more than 7 days ■ fever gets worse or lasts more than 3 days ■ redness or swelling is present ■ new symptoms occur ■ cough comes back, or occurs with fever, rash, or headache that lasts. These could be signs of a serious condition. NIGHT TIME SEVERE COLD & FLU: Liver warning: This product contains acetaminophen. Severe liver damage may occur if you take: ■ more than 4,000 mg in 24 hours, which is the maximum daily amount ■ with other drugs containing acetaminophen ■ 3 or more alcoholic drinks daily while using this product Allergy alert: Acetaminophen may cause severe skin reactions. Symptoms may include: ■ skin reddening ■ blisters ■ rash If a skin reaction occurs, stop use and seek medical help right away. Sore throat warning: If sore throat is severe, persists for more than 2 days, is accompanied or followed by fever, headache, rash, nausea, or vomiting, consult a doctor promptly. Do not use ■ with any other drug containing acetaminophen (prescription or nonprescription). If you are not sure whether a drug contains acetaminophen, ask a doctor or pharmacist. ■ if you are now taking a prescription monoamine oxidase inhibitor (MAOI) (certain drugs for depression, psychiatric, or emotional conditions, or Parkinson’s disease), or for 2 weeks after stopping the MAOI drug. If you do not know if your prescription drug contains an MAOI, ask a doctor or pharmacist before taking this product. Ask a doctor before use if you have ■ liver disease ■ heart disease ■ diabetes ■ high blood pressure ■ thyroid disease ■ glaucoma ■ trouble urinating due to an enlarged prostate gland ■ a breathing problem such as emphysema or chronic bronchitis ■ persistent or chronic cough such as occurs with smoking, asthma, or emphysema ■ cough that occurs with too much phlegm (mucus) Ask a doctor or pharmacist before use if you are ■ taking the blood thinning drug warfarin ■ taking sedatives or tranquilizers When using this product ■ do not use more than directed ■ excitability may occur, especially in children ■ marked drowsiness may occur ■ alcohol, sedatives, and tranquilizers may increase drowsiness ■ avoid alcoholic drinks ■ use caution when driving a motor vehicle or operating machinery Stop use and ask a doctor if ■ nervousness, dizziness, or sleeplessness occur ■ pain, nasal congestion, or cough gets worse or lasts more than 7 days ■ fever gets worse or lasts more than 3 days ■ redness or swelling is present ■ new symptoms occur ■ cough comes back, or occurs with fever, rash, or headache that lasts . These could be signs of a serious condition.
Keep out of reach of children
If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children.
Directions
Directions KICKSTART SEVERE COLD & FLU ■ do not take more than directed (see Overdose warning) ■ do not take more than 6 doses in any 24-hour period ■ measure only with dosing cup provided ■ do not use dosing cup with other products ■ dose as follows or as directed by a doctor ■ adults and children 12 years of age and over: 20 mL in dosing cup provided every 4 hours ■ children under 12 years of age: do not use NIGHT TIME SEVERE COLD & FLU ■ do not take more than directed (see Overdose warning) ■ do not take more than 4 doses in any 24-hour period ■ measure only with dosing cup provided ■ do not use dosing cup with other products ■ dose as follows or as directed by a doctor ■ adults and children 12 years of age and over: 20 mL in dosing cup provided every 4 hours ■ children under 12 years of age: do not use
Other information
Other Information KICKSTART SEVERE COLD & FLU ■ each 20 mL contains: sodium 12 mg ■ store at 20-25°C (68-77°F) ■ do not refrigerate NIGHT TIME SEVERE COLD & FLU ■ each 20 mL contains: sodium 16 mg ■ store at 20-25°C (68-77°F) ■ do not refrigerate
Inactive ingredients
KICKSTART SEVERE COLD & FLU ammonium glycyrrhizate, anhydrous citric acid, D&C yellow no. 10, edetate disodium, FD&C blue no. 1, flavors, glycerin, propylene glycol, purified water, sodium benzoate, sodium citrate, sorbitol, sucralose, xanthan gum NIGHT TIME SEVERE COLD & FLU ammonium glycyrrhizate, anhydrous citric acid, ascorbic acid, edetate disodium, FD&C blue no. 1, FD&C red no. 40, flavors, glycerin (soy), propylene glycol, sodium benzoate, sorbitol, sucralose, triacetin, triethyl citrate, water, xanthan gum
Questions?
1-866-MUCINEX (1-866-682-4639)
Label text from the FDA structured product label by Reckitt Benckiser LLC (revised May 19, 2026). Long sections are shortened; the complete label is on DailyMed.
MUCINEX FAST MAX Liquid Cold and Flu Kickstart and MUCINEX Nightshift Kickstart NDC products (1)
| NDC | Strength & form | Labeler | Type |
|---|---|---|---|
| 72854-139 | Kit | Reckitt Benckiser LLC | OTC MONOGRAPH DRUG |
Frequently asked questions
What is MUCINEX FAST MAX Liquid Cold and Flu Kickstart and MUCINEX Nightshift Kickstart used for?
Uses KICKSTART SEVERE COLD & FLU: temporarily relieves these common cold and flu symptoms: ■ cough ■ nasal congestion ■ minor aches and pains ■ sore throat ■ headache ■ stuffy nose ■ sinus congestion and pressure ■ temporarily reduces fever ■ helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive NIGHT TIME…
Who makes MUCINEX FAST MAX Liquid Cold and Flu Kickstart and MUCINEX Nightshift Kickstart?
MUCINEX FAST MAX Liquid Cold and Flu Kickstart and MUCINEX Nightshift Kickstart is listed by 1 labeler in the FDA NDC directory, including Reckitt Benckiser LLC.