: Mr. Henderson arrives with a prescription for Urocit-K, an extended-release tablet designed to prevent recurrent kidney stones. While he could technically buy an OTC version, Leo explains that medical-grade versions are strictly regulated for dosage and slow-release to prevent stomach irritation and "spikes" in blood potassium. Key Differences at a Glance Potassium citrate (oral route) - Side effects & dosage

However, there are significant differences between OTC supplements and the prescription versions typically used for medical conditions like kidney stones. The Pharmacist’s Story: A Tale of Two Potassia

: Sarah walks in looking for a general electrolyte boost for her marathon training. Leo points her to the supplement aisle , where brands like NOW Foods and Nutricost offer OTC potassium citrate. These are widely available without a script.

Leo, a local pharmacist, often sees two types of customers looking for potassium citrate.