What is approprriate dose for an adult with moderate vitamin D3 deficiency? Is taking 50, 000 units once per week reasonable or too high?

Vitamin D deficiency. 4000iu orally daily for a maximum of 28000 iu weekly normally recommended . For severe deficiency 50000 iu weekly for maximum 6 weeks are effective. However should watch for side effects of overdose e.g. Headaches,muscular pain ,urinary stones , GI symptoms and effects on BP and sugar.