The best way to get rid of headaches is GC Green Cross (Joo) RP Bio Tacsen.

I have such severe migraines that I always keep GC Green Cross (Ltd.) RP Bio Taksen as an emergency medication.

I initially took it based on the pharmacist's recommendation, and it was perfect for relieving headaches.

They say that when I have severe migraines or headaches like mine, taking 3 capsules is recommended.

And if you need to take more, take 1 to 2 additional capsules after 30 minutes, but it is recommended not to exceed a maximum daily dose of 5 capsules.
It seems that taking up to 3 capsules is recommended for faster effects, but I found that 2 capsules are also sufficient, and my persistent headache subsided within 2 hours.