There are many treatments available for migraine. The important issue is working out what is provoking the attack. This can range from cervical dysfunction, stress, hormonal imbalance, diet, smell etc. Physiotherapy should be able to deal very well with the identification of the cause, much of the treatment and also assist in the appropriate referral when necessary.
In my experience migrane is likely to be multifactorial and require a combined approach often with two therapeutic approaches.