Other Information: Store between 68-77 degrees F (20-25 degrees C). Misc: 1200 mg Guaifenesin & 120 mg Pseudoephedrine HCl extended-release bi-layer tablets. Clears nasal/sinus congestion. Thins and loosens mucus. Immediate and extended release. Unique bi-layer tablet. Contains FD&C Yellow Dye No. 6. Please visit our web site www.mucinex.com. Health. Hygiene. Home. Questions? 1-866-Mucinex (1-866-682-4639) You may also report side effects to this phone number. Choose from the Mucinex line of products to treat your symptoms. Made in England.