noun
treatment method; cure; remedy
Refers to a specific medical or therapeutic approach, procedure, or regimen for treating a disease or condition.
この病気にはまだ有効な治療法が見つかっていない。
An effective treatment for this disease has not yet been found.
医者
The doctor suggested trying a new treatment method for the patient.
療法 is a broader term for therapy or a therapeutic method, often used in compounds like 食事療法 (diet therapy). 治療法 is more specifically a medical treatment method.
Compound of 治療 (ちりょう, 'medical treatment') and 法 (ほう, 'method').