Question: What are the treatments for Hypertonia ?
Answer: Muscle relaxing drugs such as baclofen, diazepam, and dantrolene may be prescribed to reduce spasticity. All of these drugs can be taken by mouth, but baclofen may also be injected directly into the cerebrospinal fluid through an implanted pump. Botulinum toxin is often used to relieve hypertonia in a specific area of the body because its effects are local, not body-wide. People with hypertonia should try to preserve as much movement as possibly by exercising within their limits and using physical therapy. Drugs that affect the dopamine system (dopamine is a chemical in the brain) such as levodopa/carbidopa, or entacapone, are often used to treat the rigidity associated with Parkinson's disease.
Source: NINDS