The proper adult dosage of Robitussin Multi-Symptom Cold CF is 10 milliliters every four hours, states Pfizer. The formulation contains an expectorant and cough suppressant to relieve chest congestion and coughing and a ... More »

Robitussin DM's two active ingredients are dextromethorphan, which is a cough suppressant, and guaifenesin, which is an expectorant. Some of Robitussin DM's inactive ingredients are menthol, high fructose corn syrup, pur... More »

Guaifenesin and dextromethorphan are the active ingredients in Robitussin DM cough syrup, according to MedicineNet. Each 5 milliliters of the syrup contains 100 milligrams of guaifenesin and 10 milligrams of dextromethor... More »

According to, the correct dose of DayQuil Cold and Flu liquid is 2 tablespoons, or 30 milliliters, every four hours for adults and children 12 years or older. Children from age 6 to under 11 are advised to take... More »

The recommended dosage for adults and children over 12 is 30 milliliters every six hours for liquid Nyquil and two capsules with water every six hours for NyQuil LiquiCaps, according to Intake of either medica... More » Health Medications & Vitamins

According to the official package information for Vick's DayQuil, the proper dosage for adults and children over 12 years of age is 30 milliliters every four hours. The proper dosage for children ages 6 to 12 is 15 milli... More » Health Medications & Vitamins

The dosage for Delsym 12 Hour Cough Relief for adults and children 12 years and older is 10 milliliters every 12 hours, up to 20 milliliters in 24 hours, states Delsym. Children 6 to under 12 years take 5 milliliters eve... More » Health Medications & Vitamins