Hycodan cough syrup is a prescribed medication that contains a combination of the substances hydrocodone and homatropine. These two drugs help to relieve dry coughs because hydrocodone is a narcotic that suppresses the need to cough, while homatropine is an anticholinergic, according to WebMD. The medication homatropine is added to this cough syrup to prevent an overdose of hydrocodone, relates MedicineNet.
Doctors prescribe Hycodan cough syrup only for short-term use for coughs associated with a cold. People who have certain medical conditions, such as asthma or emphysema, should not use this medication, states WebMD. Similarly, it is not recommended for children under the age of 6.
Some possible side effects of Hycodan are nausea, dizziness, vomiting, and allergic reaction in some cases.