甲芬那酸（英文：Mefenamic acid），或称为甲灭酸与扑湿痛，是一种非类固醇消炎止痛药，用途是用来治疗包括经痛等的疼痛。这种药物在美国的上市商品名称为「Ponstel」，辉瑞制药将其以名称「Ponstan」销售到全世界，在亚洲被称之为「宝速达尔」（Ponstal），在澳洲则是称之为「Parkemed」，而在瑞士则是称之为「Mephadolor」。甲芬那酸也被核准用作退烧药（antipyretic）。

Mefenamic acid is a member of the anthranilic acid derivatives (or fenamate) class of NSAID drugs, and is used to treat mild to moderate pain, including menstrual pain, and is sometimes used to prevent migraines associated with menstruation. It is not widely used due to its side effects.