This is one of the headache disorders I was diagnosed with last year.
The drugs people with cluster headaches take have side effects, some of them severe. Pain killers are usually ineffective and can be addictive. Steroids can be effective, but their use is limited by the damage they can do to the body. Triptans such as Imitrex can affect the heart, and some say they prolong the cluster cycle or cause rebound headaches.
Anti-convulsant drugs can affect mental acuity. Some medications are expensive enough to drive the sufferer into bankruptcy.
If you take a few minutes to watch this then you’ll understand why I became an advocate for headache disorders.https://www.youtube.com/watch?v=ZeUha85wM9s&feature=youtu.be