Medicine for Headache?

What medicine do you take when you have a bad headache? A paracetamol? What is headache? It is an effect. There is something else that is causing it. The cause could be one of the following or something else:

Jagannath, The Charioteer

Kato:panishad uses a metaphor ratha, chariot for human body. If the body is a chariot, who is traveling in it? Who is its charioteer? What kind of horses does this body chariot have? What are the reins of its horses?