A: Thank you for your question about Mucinex® Fast-Max® Severe Congestion & Cough liquid. Adults and children 12 years of age and over: 20 mL in dosing cup provided every 4 hours. Do not take more than 6 doses in any 24-hour period.

A: Hi Mojgan. We advise that you speak with your healthcare provider if you are under a doctor's care for an existing medical condition or are taking any other medication before taking any Mucinex® Brand products.

A: Thank you for your question about our Mucinex® Fast-Max® Severe Congestion & Cough liquid. The ingredients in this product provide temporary relief of cough, nasal & chest congestion symptoms. We recommend that you speak with your healthcare provider to determine the best product for your specific needs.

A: Thank you for your question. Mucinex® Fast-Max® Adult Liquid Severe Congestion & Cough contains guaifenesin, dextromethorphan, and phenylephrine. Guaifenesin is not known to cause drowsiness. The active ingredient dextromethorphan has been shown to produce drowsiness in some patients. Phenylephrine is known to be a stimulant which can be considered non-drowsy. These three ingredients together cannot be considered non-drowsy due to the inclusion of dextromethorphan.

A: Thank you for your question. Mucinex® Fast-Max® Adult Liquid Severe Congestion & Cough contains the active ingredients guaifenesin, dextromethorphan, and phenylephrine. Guaifenesin is not known to cause drowsiness. Dextromethorphan has been shown to produce drowsiness in some patients. Phenylephrine is known to be a stimulant which can be considered non-drowsy. These three ingredients together cannot be considered non-drowsy due to the inclusion of dextromethorphan. Hope this helps.

A: Hi, thank you for your question! We recommend that you speak with your healthcare provider before taking any Mucinex® Brand product when there is an existing condition. Hope this helps.

A: Hi. We always recommend that you speak with your healthcare provider before taking any Mucinex® Brand product when you are already any taking other over the counter or prescription medications. Hope this helps.

A: Thank you for your interest in Mucinex® Fast-Max® Severe Congestion & Cough liquid. You should not use this product if you are currently taking a prescription monoamine oxidase inhibitor (MAOI) or for 2 weeks after stopping the MAOI prescription drug. If you do not know if your prescription drug contains an MAOI, speak with your Doctor before taking this product. Hope this helps.

A: Hi Yanina, You can take the product up to 7 days but we suggest stopping use and speaking with your doctor if symptoms persist.

A: Hi Christa. For Mucinex® Fast-Max® Severe Congestion & Cough the directions state: Adults and children 12 years of age and over: 20 mL in dosing cup provided every 4 hours. Do not take more than 6 ounces in any 24-hour period.