Hi
IMHO, Yes. Well I feel so. Firstly, Botox is a ‘foreign body’ as you say yourself. A drug taken as a tablet used for migraine prevention is a ‘substance’. It goes through yr digestive tract, is utilised over a short period, generally a few hours and then is gone or at least is no longer active. Botox goes under the skin and presumably is active in the body over a much longer period. A month or longer? Injectable preventatives (assuming there are some to treat MAV?). Are perhaps to be considered like Botox to be more invasive. As I see it the advantage of preventatives solely in pill form is that, with luck, should one prove allergic to the drug one’s body can quite easily eject it by natural means which, as a person super sensitive to meds, I would find a reassuring advantage. Lots of people are lucky enough not to need to give such things a second thought.