Parkinson's disease presents with rigidity, mainly due to increased muscle tone and muscle rigidity, which is a very important clinical manifestation of Parkinson's disease. The medications used for rigidity in Parkinson's disease mainly include the following types. The first type is dopamine receptor agonists, which can improve limb muscle rigidity to some extent and delay the progression of the disease. The second type of medication is levodopa preparations, which are currently the gold standard for treating Parkinson's disease. Many patients experience significant clinical improvement after taking the medication. The third type of medication includes some anticholinergic drugs. These drugs are particularly effective against tremors and also have some effect in improving rigidity. Medication for Parkinson's disease must be taken under the guidance of a doctor. It is also important to note that levodopa preparations should be taken on an empty stomach or two hours after a meal for better efficacy.