Key takeaways
Dantrolene (Dantrium) and propranolol (Inderal LA) are both prescription medications, but they serve different purposes and belong to different drug classes. Dantrolene is a muscle relaxant used to treat muscle stiffness or spasms and prevent malignant hyperthermia during surgery. It works by blocking the release of calcium in muscles, which stops them from contracting. On the other hand, propranolol is a non-selective beta blocker that helps with high blood pressure, chest pain, migraines, and tremors by slowing down your heart rate and relaxing blood vessels. Dantrolene is taken multiple times a day, while propranolol can be taken once daily if using the extended-release form. Dantrolene can cause liver problems, while propranolol can hide symptoms of low blood sugar and is not safe for people with asthma. Both medications are available in generic forms and can cause dizziness and tiredness.
