HYPERTENSION (SEE NOTES ABOVE), 500 MICROGRAMS 2 - 3 TIMES DAILY FOR 3 - 7 DAYS, THE INITIAL DOSE ON RETIRING TO BED AT NIGHT (TO AVOID COLLAPSE, SEE CAUTIONS); INCREASED TO 1 MG 2 - 3 TIMES DAILY FOR A FURTHER 3 - 7 DAYS; FURTHER INCREASED IF NECESSARY TO MAX. 20 MG DAILY IN DIVIDED DOSES
CONGESTIVE HEART FAILURE (BUT SEE SECTION 2.5.5), 500 MICROGRAMS 2 - 4 TIMES DAILY (INITIAL DOSE AT BEDTIME, SEE ABOVE), INCREASING TO 4 MG DAILY IN DIVIDED DOSES; MAINTENANCE 4 - 20 MG DAILY IN DIVIDED DOSES (BUT RARELY USED)
RAYNAUD'S SYNDROME (BUT EFFICACY NOT ESTABLISHED, SEE SECTION 2.6.4), INITIALLY 500 MICROGRAMS TWICE DAILY (INITIAL DOSE AT BEDTIME, SEE ABOVE) INCREASED, IF NECESSARY, AFTER 3 - 7 DAYS TO USUAL MAINTENANCE 1 - 2 MG TWICE DAILY