Please do not worry. This medication is a general tonic composed of five biochemic tissue salts: Calcium phosphate, Iron phosphate, Potassium phosphate, Magnesium phosphate, and Sodium phosphate. Because it is a supportive health supplement and not a critical life-saving drug, it is completely safe to wait for it to be back in stock. If you prefer not to wait, you can ask your pharmacist for any generic 'five biochemic phosphates' combination, typically in 6X potency, from another reputable manufacturer. Please consult your healthcare provider before switching.