Diabetes Insipidus (DI): also see Diabetes Mellitus (DM)

Three causes
1. Lack of ADH (neurogenic)
ADH stimulate water absorption of kidney tubule
2. Resistant to ADH (nephrogenic)
3. Excessive thirst (dipsogenic)

Symptoms:

• Polyuria (excessive urination)
  What is difference in urine of DI and DM?
• Polydipsia (increased drinking/water intake)