Fabacado

So I know it says on the wiki that it’s extremely toxic in large quantities, but that seems to be the only drawback to the magical potion that just makes everything go perfectly for you. It is also said to make you a bit reckless but it’s not like it’ll kill you (I don’t think anyway I’m not sure that would be perfect unless you wanted to die(?) What would be considered large quantities anyway like once a day?a week?a year? Like what are the parameters because I feel like more people should have been using it especially they were adept at potion making, like why weren’t the order and death eaters just chugging the stuff during the war, surely if your about to go into a life threatening situation you would want a little luck on your side? On that note what would happen if two people who were both set to have a perfect day having drank the potion were to duel? Would there be some kind of third party incident to interpret letting them both leave unscathed or would one just have the perfect last day of their life? Also I understand that you can’t drink it before taking an exam as it would likely be viewed as cheating but what’s to stop you from taking it the night before or a couple days before to have the perfect review before an exam? Maybe there are more drawbacks I’m not aware of because I honestly don’t understand why people weren’t utilising this more or maybe I’m just insane but I think I would definitely risk a bit of poisoning to be extremely lucky and just have things work out for me, especially in the middle of a war.