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Pronunciation

di-JOX-in

Classifications

Therapeutic Classification: antiarrhythmics, inotropics

Pharmacologic Classification: digitalis glycosides

Indications

BEERS REMS, High Alert


Action

  • Increases the force of myocardial contraction.
  • Prolongs refractory period of the AV node.
  • Decreases conduction through the SA and AV nodes.
Therapeutic effects:
  • Increased cardiac output (positive inotropic effect) and slowing of the heart rate (negative chronotropic effect).

Pharmacokinetics

Absorption: 60–80% absorbed after oral administration of tablets; 70–85% absorbed after administration of elixir; 80% absorbed from IM sites (IM route not recommended due to pain/irritation). IV administration results in complete bioavailability.

Distribution: Widely distributed to tissues.

Metabolism/Excretion: Excreted almost entirely unchanged by the kidneys.

Half-Life: 36–48 hr ( in renal impairment).

Time/Action Profile

(antiarrhythmic or inotropic effects, provided that a loading dose has been given)

ROUTEONSETPEAKDURATION
PO30–120 min2–8 hr2–4 days
IM30 min4–6 hr2–4 days
IV5–30 min1–4 hr2–4 days



Duration listed is that for normal renal function; in impaired renal function, duration will be longer.

Contraind./Precautions

Contraindicated in:

Use Cautiously in:

Adv. Reactions/Side Effects

CV: bradycardia, ARRHYTHMIAS, ECG changes, heart block

EENT: blurred vision, yellow or green vision

GI: anorexia, nausea, vomiting, diarrhea

Hemat: thrombocytopenia

Neuro: fatigue, headache, weakness.

Interactions

Drug-drug:

Drug-Natural Products:

Route/Dosage

Availability

(Generic available)

Assessment

Lab Test Considerations:

Toxicity and Overdose:

Implementation

IV Administration:

Patient/Family Teaching

Evaluation/Desired Outcomes

US Brand Names

Lanoxin

Pill Image

digoxin_195-8939.jpg

Code

NDC Code