Preparation	Dosage	Side effects
Hydromorphone-guaifenesin (e.g., Hycotuss)	5 mg per 100 mg per 5 mL (one teaspoon)*	Sedation, nausea, vomiting, respiratory depression
Dextromethorphan (e.g., Delsym)	30 mg every 12 hours	Rarely, gastrointestinal upset or sedation
Hydrocodone (e.g., in Hycodan syrup or tablets)	5 mg every 4 to 6 hours	Gastrointestinal upset, nausea, drowsiness, constipation
Codeine (e.g., in Robitussin A-C)	10 to 20 mg every 4 to 6 hours	Gastrointestinal upset, nausea, drowsiness, constipation
Carbetapentane (e.g., in Rynatuss)	60 to 120 mg every 12 hours	Drowsiness, gastrointestinal upset
Benzonatate (Tessalon)	100 to 200 mg three times daily	Hypersensitivity, gastrointestinal upset, sedation