Is it okay to take amoxicillin and mefenamic acid at the same time? i am currently suffering from an ear pain at my left ear and i consulted 2 different doctors. the former prescribed me with amoxicillin and the later gave me mefenamic acid. i started with amoxicillin first and now i am in between whether i should take or not take mefenamic acid. i am afraid these two drugs will compete and brings major side effects on me?