I have been taking 40mg of Lisinopril for many years(4-5) for high blood pressure. I previously had migraines that went away after having various treatments. I wasn’t taking Lisinopril for migraines but maybe it was helping them. My doctor decreased the Lisinopril to 30mg because my blood pressure was low. My migraines have returned. Is this just a temporary adjustment or should I start 40mg again?