Cyclobenzaprine Hydrochloride (HCl) Information

Cyclobenzaprine hydrochloride (HCl) is a prescription muscle relaxant sold under the brand name Flexeril®. This medication comes in the form of a tablet that is typically taken three times a day, although certain people may need to take it less frequently.
 
This drug can cause significant drowsiness, so your healthcare provider may recommend that you take it only at night, especially if you need to be alert during the day. Other possible side effects include dry mouth, fatigue, and dizziness.
 
Before using cyclobenzaprine, make sure your healthcare provider has up-to-date information on any other drugs you are taking, including vitamins and supplements, as well as any allergies you may have, including to medications, foods, dyes, or preservatives. Also, let your healthcare provider know if you have any other medical conditions, such as liver disease, glaucoma, or an overactive thyroid.
 
(To learn more about this drug and its effects within the body, click Cyclobenzaprine.)
 
Written by/reviewed by: Arthur Schoenstadt, MD
Last reviewed by: Arthur Schoenstadt, MD