A vitamin D level of 5 ng/mL is classified as severe deficiency. Short‑term treatment with high‑dose cholecalciferol, such as Uprise D3 60K daily for about 8 days, is a common medical approach to restore levels under supervision rapidly. Because you have a history of kidney stones, extra caution is warranted: vitamin D increases calcium absorption, which, in some people, can raise urinary calcium and stone risk. Even so, a brief, closely monitored course is generally considered acceptable when the deficiency is significant, provided you maintain good hydration and follow up with your doctor. It is important to take the medication exactly as prescribed, avoid extending or repeating the dose on your own, and undergo review with repeat vitamin D and calcium‑related tests. Your doctor can then adjust further treatment based on your individual kidney stone risk profile.