Those using propranolol for anxiety should plan to take their dose an hour or so before they wish to feel the desired effect. At first i thought it wasn't working at all, but my doctor told me to stay on it for at least 2 months. The Stigma Of Migraine - The Journey Of Living With And Fighting It - Migraine Migraine Migraine Headaches Migraines Remedies Hi i take propranolol for migraine and anxiety, and i found that if i jiggled the dose til it felt right for me, it stopped most migraines from occuring and i was able to eat chocolate, cheese etc again but if i overindulged id get a migraine. How long does propranolol take to work for migraines . Who should take beta blockers? How long does propranolol last? Food and drug administration (fda) for preventing migraine attacks. Propranolol, which treats high blood pressure, irregular heart rhythms, chest pain, and other heart symptoms, is also approved by the u.s. I saw some results approximately two months after i began ...