Remedies are first choise.

Remedies are causing for blockage are beta receptors.
Effect of mechanism.
As beta blockers is a remedy for the first choose , but they are affecting on 65 percents, as they are blocking for homologic mediators in beta receptors of simpatico nerve system, and these receptors finding in the heart muscle and in smooth muscle of vessels, bronchus and bowel s highway.Beta blockers within many years as success using for curing hypertension, disease of venous  vessels, bad of heart rhythm, and in cns also having are beta receptors. And thanks of an own effect on the cardiovascular system they are effectively for diseases of cns, as in tremor, phobias, and in diseases with headaches, and a right mechanism of effecting of preventing effect is not known, but probably, effecting having on the central highway of simpatico nerve system and information substances as serotonin and adrenalin. And beta blockers today are many, which of helping in migraine, but not are all, and importance remedies of these series are metoprolol and propranolol, and they are using regularity and with slowly rising and begin dose of metopropranol as 50 mg  is on the evening ,that positive results leading in a few patients, and in hypotonia and dizziness use half dosage beginning and usual dose are 100-150 Mg and allowed dosages are 50-200 mg, as usual dose for  propranol are 120-200 mg, and allowed dosages are 40-240 mg/day, rising slowly dose as with a week interval.