If you wanna get a high dose of potassium quickly without a prescription, just drink classic crystal lite for a few days. It's more economical than buying high-dose potassium citrate pills and will give you more medicine than you can get from food. I take mega doses of potassium for kidney stones and it's cheaper to drink cyrstal lite vs buying Urocit-K pills with something like 1080mg of potassium per pill.