I am allergic to over 60 drugs - I can relate. But gabapentin is my friend. I am so sorry all of that happened to you. ConsumerLab.com is a consumer watchdog group that tests supplements for purity, strength, etc. They found that AlgaeCal has 87% of the magnesium it says it has and it has too much lead in it. Good thing you stopped taking it. It is not approved by ConsumerLab. There are better sources of calcium out there. The nutritionist told me to get calcium from oyster shells, coral, etc. I'm dealing with a dying pet tonight - but I'll try to find more about calcium for you if you want. Your body is the boss of you!