Adams Respiratory Therapeutics  versus Perrigo - construction of the pharmacokinetic  claim in terms of Cmax

• A company named Adams Respiratory Therapeutics  holds a patent number (5, 372, 252,) and this patent  covers an ER formulation that contains guaifenesin (it is an expectorant which is used to thin, loosen, and help to expel  the mucus which  causes congestion).
• Perrigo tried for the FDA approval for a generic of Adams' product, Mucinex(r).