Diabetes insipidus | Diabetes mellitus |
The condition is due to decrease in the hormone vasopressin. | The condition is due to decrease in the hormone insulin. |
The hypothalamus or pituitary gland is affected. | The pancreatic β-cells are affected. |
There is excessive urination which results in loss of water and increase in the level of electrolytes in the body. | There is increase or decrease in the level of glucose in the blood. |
Polydipsia is observed. | Polyphagia is observed. |