FLINT D Soft gel stuffy nose 250 products oral liquids cough centre blood vessels nerve signals nasal passage Phenylephrine 5 monopoly rights customer support competitive rate superior quality SYRUP INDICATIONS cough suppressant allergic reactions attractive packaging antihistaminic agent Dextromethorphan 15 mg Lichem Pharmaceuticals Action Dextromethorphan Chlorpheniramine Maleate Third Party Manufacturing Pharma Marketing industry PCD Franchise requirements leading PCD Pharma Company PCD Pharma Franchise Company Cold Dry Cough Bronchitis Acute Sinusitis Nasal Congestion Allergic Rhinitis Mechanism