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- for HTN; 
- central alpha agonist, 
- similar to clonidine; 
- Adult: 
- begin 4mg PO bid, increase by 4mg/day increments at 1 week intervals up to 32mg bid as needed; 
- sedation, dry mouth, dizziness, HA, all are common; 
Peds: >12 yrs: 0.5-4 mg/day initially; increase by increments of 0.5-2.0 mg/day at 1 week intervals up to 24 mg/day divided bid