Overview Study to Evaluate the Pharmacokinetics of Mucinex® 1200 mg Extended-Release Tablet Status: Completed Trial end date: 2011-10-15 Target enrollment: Participant gender: Summary Characterize and assess PK of guaifenesin in Mucinex® 1200 mg ER Bi-Layer Tablet Phase: Phase 1 Details Lead Sponsor: Reckitt Benckiser LLCTreatments: Chlorpheniramine, phenylpropanolamine drug combinationGuaifenesinPhenylpropanolamine