Tabs: 3.125mg, 6.25mg, 12.5mg, 25mg;
ER capsules: 10mg, 20mg, 40mg, and 80mg; 6.25mg PO BID on instances of monitoring standing BP 1 hour after the first dose. If tolerated continue dosage for 7-14 days and may increase to 12.5mg PO BID for 7-14 days following same BP protocol. If tolerated well, may be increased (if needed) to 25mg bid; not to exceed 50mg/day; EXT REL cap 20mg/day, may increase after 7-14 days to 40 mg/day, max 80 mg/day
(Wolters Kluwer, 2016, pp. 278-280).