Possibly effective

Candesartan (Atacand)

Carbamazepine (Tegretol)

Lisinopril

Nebivolol (Bystolic)

Nicardipine (Cardene)

Conflicting or inadequate data to support or refute use

Bisoprolol (Zebeta)

Fluoxetine (Prozac)

Gabapentin (Neurontin)

Nifedipine

Nimodipine (Nimotop)

Pindolol

Protriptyline

Verapamil

Ineffective

Acebutolol (Sectral)

Lamotrigine (Lamictal)

Oxcarbazepine (Trileptal)

Telmisartan (Micardis)