Dr. Reddy's Laboratories has launched an over-the-counter (OTC) store-brand equivalent of Mucinex D Extended-Release Tablets in two strengths-Guaifenesin 600 mg and Pseudoephedrine HCI 60 mg, and Guaifenesin 1200 mg and Pseudoephedrine HCI 120 mg in the United States market, as approved by the US Food and Drug Administration (USFDA).