What drug is instant relief for migraines?

I'm curious, what drug provides immediate relief for those suffering from migraines? Is there a specific medication that is known to bring swift alleviation to the intense pain and discomfort associated with these headaches? Are there any side effects or precautions that patients should be aware of when considering this type of treatment? Additionally, are there any alternative methods or therapies that can offer similar relief for migraine sufferers?