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Antiarrhythmic Drug Guide | Class II


Propranolol

IV Dose0.02 mg/kg every 5 min to 0.1 mg/kg total dose.
Oral dose2 mg/kg/day divided q 6 hours to start. Increase routinely to 5 mg/kg/day. May in rare circumstances go to 14 mg/kg/day, watching levels.
Inderal LA should be given BID in children
Levels25-150 nanograms/ml for beta blockade.
150-1000 ng/ml for control of VT.
KineticsLarge first-pass metabolism in liver.
Elimination half-life 4-6 hours. (T 1/2 of 4-hydroxy-P 5.2-7.5 hours, active).
Peak levels at 2-3 hours after oral dose.
CautionsContraindicated in asthma, congestive heart failure.
Beware hypoglycemia in infants and diabetics
InteractionsLevels increased by cimetidine.
Contraindicated with verapamil, due to synergistic negative inotropic effect and cardiovascular collapse
Increases hepatic lidocaine metabolism.
PreparationsInderal scored tabs: 10, 20, 40, 60, 80, 90 mg.
Inderal LA capsules: 60, 80, 120, 160 mg.
Inderal injection, 1 mg/1 ml ampules.
FDA approval in childrenyes



Atenolol

IV DoseNo IV form
Oral dose1 mg/kg/day, up to 2 mg/kg/day given QD.
LevelsNot helpful
KineticsElimination half-life 5-9 hours in adults, 16 hours in neonates.
Peak levels 2-3 hours after oral dose.
CautionsSimilar to propranolol. More cardioselective, less problems with asthma and hypoglycemia.
InteractionsNo effect on hepatic lidocaine metabolism.
PreparationsTenormin non-scored tablets: 25, 100 mg.
scored tablets, 50 mg.
FDA approval in childrenno



Nadolol

IV Dose
Oral dose1-2 mg/kg/day, given QD. Adjust up or down after 5 days based on side effects, sinus rate, and efficacy.
LevelsNot yet clinically useful
KineticsElimination half-life 12-24 hours. Peak levels at 3-4 hours after oral dose.
CautionsSimilar to propranolol. Not particularly cardioselective, but fewer CNS side effects.
Interactions
PreparationsCorgard non-scored tabs: 20, 40, 80 mg scored tablets: 120, 160 mg
FDA approval in childrenno



Metoprolol

IV Dose5 mg q 2 minutes to total 15 mg in adults post MI
Oral dose100-450 mg/day in adults divided qd or bid
Levelsunknown
KineticsPlasma half-life 3-7 hours in adults
CautionsSimilar to propranolol. Fairly cardioselective.
Interactionssimilar to propranolol
PreparationsLopressor scored tabs: 50, 100 mg
Lopressor injection, 1 mg/cc, 5 cc ampuls
FDA approval in childrenno



Pindolol

IV Dose
Oral doseDrug of choice in vasodepressor syncope, because of intrinsic sympathomimetic activity. 10-60 mg/day in adults divided bid
LevelsUnknown
KineticsPlasma half-life 3-4 hours. Clearance reduced in uremia
CautionsSimilar to other beta blockers.
InteractionsISA may be blocked by other beta blockers
PreparationsVisken "heart-shaped" non-scored tabs: 5, 10 mg.
FDA approval in childrenno



Esmolol

IV Dose500 ug/kg/min for 1 minute, then 50 ug/kg/min.
Repeat bolus in 5 minutes, increase infusion to 100 ug/kg/min if no effect. Further increases with boluses up to 200 ug/kg/min as necessary
Oral dose
LevelsUnknown
KineticsElimination half-life 9 minutes.
CautionsHypotension occurs transiently in 44%. CNS side effects are common, esp. emesis (16%).
InteractionsIncreases digoxin levels by 10-19%. Levels increased by warfarin, morphine.
PreparationsBreviblock injection, 2.5 grams/10 ml ampule
FDA approval in childrenno


Propranolol

IV Dose0.02 mg/kg every 5 min to 0.1 mg/kg total dose.
Oral dose2 mg/kg/day divided q 6 hours to start. Increase routinely to 5 mg/kg/day. May in rare circumstances go to 14 mg/kg/day, watching levels.
Inderal LA should be given BID in children
Levels25-150 nanograms/ml for beta blockade.
150-1000 ng/ml for control of VT.
KineticsLarge first-pass metabolism in liver.
Elimination half-life 4-6 hours. (T 1/2 of 4-hydroxy-P 5.2-7.5 hours, active).
Peak levels at 2-3 hours after oral dose.
CautionsContraindicated in asthma, congestive heart failure.
Beware hypoglycemia in infants and diabetics
InteractionsLevels increased by cimetidine.
Contraindicated with verapamil, due to synergistic negative inotropic effect and cardiovascular collapse
Increases hepatic lidocaine metabolism.
PreparationsInderal scored tabs: 10, 20, 40, 60, 80, 90 mg.
Inderal LA capsules: 60, 80, 120, 160 mg.
Inderal injection, 1 mg/1 ml ampules.
FDA approval in childrenyes



Atenolol

IV DoseNo IV form
Oral dose1 mg/kg/day, up to 2 mg/kg/day given QD.
LevelsNot helpful
KineticsElimination half-life 5-9 hours in adults, 16 hours in neonates.
Peak levels 2-3 hours after oral dose.
CautionsSimilar to propranolol. More cardioselective, less problems with asthma and hypoglycemia.
InteractionsNo effect on hepatic lidocaine metabolism.
PreparationsTenormin non-scored tablets: 25, 100 mg.
scored tablets, 50 mg.
FDA approval in childrenno



Nadolol

IV Dose
Oral dose1-2 mg/kg/day, given QD. Adjust up or down after 5 days based on side effects, sinus rate, and efficacy.
LevelsNot yet clinically useful
KineticsElimination half-life 12-24 hours. Peak levels at 3-4 hours after oral dose.
CautionsSimilar to propranolol. Not particularly cardioselective, but fewer CNS side effects.
Interactions
PreparationsCorgard non-scored tabs: 20, 40, 80 mg scored tablets: 120, 160 mg
FDA approval in childrenno



Metoprolol

IV Dose5 mg q 2 minutes to total 15 mg in adults post MI
Oral dose100-450 mg/day in adults divided qd or bid
Levelsunknown
KineticsPlasma half-life 3-7 hours in adults
CautionsSimilar to propranolol. Fairly cardioselective.
Interactionssimilar to propranolol
PreparationsLopressor scored tabs: 50, 100 mg
Lopressor injection, 1 mg/cc, 5 cc ampuls
FDA approval in childrenno



Pindolol

IV Dose
Oral doseDrug of choice in vasodepressor syncope, because of intrinsic sympathomimetic activity. 10-60 mg/day in adults divided bid
LevelsUnknown
KineticsPlasma half-life 3-4 hours. Clearance reduced in uremia
CautionsSimilar to other beta blockers.
InteractionsISA may be blocked by other beta blockers
PreparationsVisken "heart-shaped" non-scored tabs: 5, 10 mg.
FDA approval in childrenno



Esmolol

IV Dose500 ug/kg/min for 1 minute, then 50 ug/kg/min.
Repeat bolus in 5 minutes, increase infusion to 100 ug/kg/min if no effect. Further increases with boluses up to 200 ug/kg/min as necessary
Oral dose
LevelsUnknown
KineticsElimination half-life 9 minutes.
CautionsHypotension occurs transiently in 44%. CNS side effects are common, esp. emesis (16%).
InteractionsIncreases digoxin levels by 10-19%. Levels increased by warfarin, morphine.
PreparationsBreviblock injection, 2.5 grams/10 ml ampule
FDA approval in childrenno
 
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