- Discussion: 
- for treatment of vascular failure in shock, hypersensitivity, or drug induced hypotension;

- used to overcome paroxysmal SVT; 
- blood pressure maintenance during spinal anesthesia; 
- alpha agonist vasoconstrictor: 
- Dosage: 
- mild hypoTN: 2-5mg IM or SQ elevatesBP for 2 hrs;

- 0.1-0.5 mg IV given as slow IV injection; 
- Dilution: 
- 10mg/250ml D5W; for severe hypotension or shock: 
- initiate continuous infusion at 100-180 ug/min, after BP stabilizes maintain rate of 40-60ug/min