While propranolol (Inderal) is very helpful for certain types of shaking, it typically does not improve muscle stiffness or walking difficulties. Because these symptoms are occurring together, they might suggest a different underlying condition that responds better to other generic medications, such as levodopa. Propranolol can also cause mild side effects like tiredness, cold hands, or dizziness. I highly recommend discussing his symptoms with his doctor or a neurologist. They can safely evaluate him and tailor a treatment plan that effectively addresses his shaking, stiffness, and walking to help him feel much better.