Usually drugs like beta-blockers which are given to control hypertension (propranolol [Inderal], atenolol [Tenormin]), anticonvulsants (topiramate [Topamax], divalproex [Depakote], carbamazepine [Tegretol]), tricyclic antidepressants (
amitriptyline [Elavil], nortriptyline [Aventyl]),
and calcium channel blockers (verapamil [Covera]) are given.You can take these as preventive medicines .
Refer http://www.spineuniverse.com/displayarticle.php/article180.