Hi Patrick. The preventatives supposedly increase our tolerance thresholds against all the hyper sensitivity reaction issues such as photophobia, visual vertigo (reacting to screen movement, patterned carpets. etc) illusion of movement (the vertigo), and all other MAV symptoms. The drugs used can often take up to four months to really kick in. There’s no way of knowing which symptom will reduce first nor is there a specific drug known to reduce any specific symptom, well, not that I’ve read anywhere as yet. Having said that I’ve read papers on photophobia by top US expert Dr Kathleen Digre who suggests amitriptyline is particularly effective for photophobia. From what I’ve read Ami is pretty effective for MAV generally and also is one of the slightly quicker acting ones with some people beginning to see results within a month or less.
I have no idea of your Diagnosis and current treatment but diet, lifestyle changes (which probably include trigger reduction, less computer time) are all part of the MAV control package that need to be taken into account. What drugs you are offered depends on the medics own ideas and also your other health conditions if any. When I was told to take preventatives my doctor selected a betablocker. By pure coincidence betablockers are also known to help with photophobia provided it is caused by migraine so There I was lucky. The vision issues, just like the other symptoms, should reduce over time. They don’t just disappear overnight or at least mine didn’t. They are a indication of the overall level of hypersensitivity for me at least. Mine have settled now to the point that if I sudden experience visual vertigo on a screen I know I’m in trouble and an acute attack is imminent. Helen