Tris hcl is combination product is use to treat coughs and other symptoms caused by the common cold or allergies. This product contains 2 medications: hydrocodone and chlorpheniramine. Hydrocodone is an opioid cough suppressant (antitussive) that acts on a certain part of the brain (cough center) to reduce the urge to cough. Chlorpheniramine is an antihistamine that helps to relieve watery eyes, itchy eyes/nose/throat, runny nose, and sneezing.
Do not use this product in children younger than 18 years. There is a risk of serious (rarely fatal) side effects, such as breathing problems. Cough-and-cold products do not cure colds. Cough due to a common cold often does not need to be treated with medicine. Ask your doctor or pharmacist about other ways to relieve cough and cold symptoms, such as drinking enough fluids, using a humidifier, or saline nose drops/spray.
If you have any questions, ask your doctor or pharmacist. Take this medication by mouth with or without food as directed by your doctor, usually every 12 hours.
Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. Do not mix this medication with other liquids or medications. Doing so can release all of the drug at once, increasing the risk of side effects. This medication may cause withdrawal reactions, especially if it has been use regularly for a long time or in high doses.
To prevent withdrawal reactions, your doctor may reduce your dose gradually. Consult your doctor or pharmacist for more details, and report any withdrawal reactions right away. When this medication is used for a long time, it may not work as well. Talk with your doctor if this medication stops working well. Though it helps many people, this medication has a risk for abuse and may sometimes cause addiction.