Key takeaways
Diazepam (Valium, Diazepam Intensol, Valtoco, Diastat) and Zanaflex (tizanidine) are both medications that can help with muscle-related issues, but they belong to different medication classes and have distinct uses. Diazepam is a benzodiazepine used for anxiety disorders, alcohol withdrawal symptoms, muscle spasms, and as an add-on for seizures. It works by increasing gamma-aminobutyric acid (GABA) levels in the brain. Zanaflex, on the other hand, is an alpha-2 adrenergic receptor agonist used to treat muscle stiffness and rigidity. It works by slowing down nerves in the spinal column that control muscle tone. Diazepam is a controlled substance with a risk of dependence and misuse, while Zanaflex is not controlled and has a lower risk of dependence and misuse. Oral forms of diazepam (tablets, liquid solution) are taken 2 to 4 times daily, whereas Zanaflex oral tablets and capsules are typically taken up to 3 times a day. Diazepam is also available as a nasal spray and a rectal gel, and tizanidine is also available as an oral liquid solution (Ontralfy). Common side effects of diazepam include sleepiness and dizziness, while Zanaflex can cause dry mouth and low blood pressure. Both medications have possible drug interactions, but diazepam tends to have more severe interactions, especially with opioids and alcohol.
