Key takeaways
Cyclobenzaprine (Flexeril) and diazepam (Valium) are both used to treat muscle spasms, but they belong to different medication classes and have distinct uses and side effects. Cyclobenzaprine is a muscle relaxant that works in the brain to relieve muscle pain and discomfort, and it is available in both immediate-release and extended-release forms. It is not a controlled substance but can cause drowsiness and dizziness, especially when combined with alcohol. Diazepam, on the other hand, is a benzodiazepine that raises levels of GABA in the brain to help with anxiety, alcohol withdrawal, muscle spasms, and seizures. It is a Schedule IV controlled substance due to its potential for misuse and dependence. Diazepam can also cause sleepiness, dizziness, and muscle weakness, and it carries risks of severe sedation and withdrawal symptoms if stopped abruptly. While both medications can make you sleepy, diazepam has a higher risk of dependence and is generally not recommended during pregnancy or breastfeeding.
