Preventative treatments are measures taken to prevent the occurrence of migraines. This usually consists of supplements or drugs taken on a regular basis, often daily, regardless of whether or not the migraineur is currently experiencing a migraine.
Do not confuse preventative treatments with abortive treatment methods, which are designed to be utilized at the onset, or during, a migraine, and should not be taken on a regular basis or in advance of a migraine.
Depending on a migraineur's triggers, sometimes changes in lifestyle habits can prevent migraines.
It may be important not only to get enough sleep, but also to maintain a consistent sleep schedule; i.e. going to bed and getting up each morning at the same time every day. Some migraines may be triggered from too much sleep, so a migraineur should figure out his/her triggers, and adjust his/her sleep schedule accordingly to prevent future migraines.
Not eating enough, and not eating often enough can trigger migraines. One common recommendation is to maintain a constant level of blood sugar; i.e. avoid skipping meals or only eating sugary foods which can cause a roller coaster of high and low blood sugar.
Dehydration is a common trigger for headaches alone, and is also a major suspect for triggering migraines.
Exercised promotes blood flow and often the flow of oxygen rich blood, as well as the release of serotonin. Theories regarding lack of oxygen rich blood to the brain triggering migraines are supported by cases where regular exercise reduces frequency and severity of migraines. The majority of migraineurs cannot use exercise as an abortive treatment, as physical exertion can worsen a migraine, but there are individuals who have found relief from a migraine through exercise. Some research has noted dips in serotonin levels during migraines, so the release of serotonin during exercised may also have an impact on migraine prevention. Overexertion can also be a trigger, so using exercise as a preventative method may require a delicate balance of physical exertion without overexertion.
* Amitriptyline * Venlafaxine (Effexor XR)
* Propranolol (Inderal La, Innopran XL, others)  * Metoprolol Tartrate (Lopressor)  * Timolol (Betimol)
Calcium Channel Blockers
* Lisinopril (Zestril)
* Valproate Sodium (Depacon) * Topiramate (Topamax)
- Mayo Clinic Staff. "Migraine: Treatments and drugs." Mayo Clinic. http://www.mayoclinic.com/health/migraine-headache/DS00120/DSECTION=treatments-and-drugs. August 22, 2013