This is the maximum strength 12 hour timed released Guaifenesin 1200 Mg, not 600 like the regular strengh 12 hour or 4 hour tablets and this is good to use for alergies as well as colds. Costco has cheaper 4 hour tablets, but some people that use it every day prefer to take it only twice a day instead of every 4 hours.Save an extra 15% with Subscribe & Save: Sign up to have this item delivered at a regular interval of your choice, and the current price drops to $12.75. Shipping is always free. N...