Diltiazem: Difference between revisions
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== | ==Administration== | ||
* | *Type: [[Calcium channel blocker]] | ||
** | *Dosage Forms | ||
** | **IV: 25 mg/5 mL and 50 mg/10 mL bottles | ||
**Oral: 30 mg, 60 mg, 90 mg | |||
*Routes of Administration: IV, PO | |||
*Common Trade Names: Cardizem | |||
== | ==Adult Dosing== | ||
* | ===[[Atrial fibrillation with rapid ventricular response]] (if hemodynamically stable)=== | ||
*Loading dose = 0.25 mg/kg (max=20 mg) IV bolus over 2 minutes | |||
**Can consider breaking down into 10 mg boluses in older patients to decrease risk of adverse reactions | |||
**If ineffective after 15 minutes: 0.35mg/kg (max=25mg) over 2 minutes | |||
**If effective: Start infusion at 5-15 mg/hr | |||
***Consider 30mg IR PO or home dose to avoid need for a drip | |||
== | ===[[Supraventricular tachycardia]] (if hemodynamically stable)=== | ||
* | *Same as for atrial fibrillation with rapid ventricular response (see above) | ||
== | ==Pediatric Dosing== | ||
* | *'''Contraindicated''' in pediatric patients <1yo | ||
** | *See [[critical care quick reference]] for drug doses by weight | ||
==Special Populations== | |||
===[[Drug pregnancy categories|Pregnancy Rating]]=== | |||
* Pregnancy Rating: C | |||
===Lactation risk=== | |||
* Lactation: Does appear to diffuse into breast milk, but doses are typically not harmful to infants | |||
===Renal Dosing=== | |||
*Adult: Not studied, use caution | |||
*Pediatric: Not studied, use caution | |||
===Hepatic Dosing=== | |||
*Adult: Not studied, use caution | |||
*Pediatric: Not studied, use caution | |||
==Contraindications== | |||
*[[Allergy]] to drug/class | |||
*Infants <1yo | |||
*[[Wide-complex tachycardia]] due to bypass tract (e.g. WPW) | |||
*Symptomatic severe hypotension | |||
*[[Sick sinus syndrome]]/2nd or 3rd degree heart block if no pacemaker | |||
*PO: acute [[MI]] and pulmonary congestion | |||
*[[Ventricular tachycardia]] | |||
*Caution if: | |||
**Hypertrophic cardiomyopathy | |||
**LV dysfunction | |||
**Concomitant beta-blockade | |||
**Hepatic/renal impairment | |||
**Heart failure | |||
==Adverse Reactions== | |||
===Serious=== | |||
*Bradycardia, AV block, BBB | |||
*Hypotension | |||
*[[CHF]] | |||
*[[SJS/TEN]] | |||
== | ===Common=== | ||
*Peripheral edema | |||
*Elevated LFTs | |||
*Headache | |||
*Dizziness | |||
*Nausea/vomiting, diarrhea, contipation | |||
*Flushing, vasodilation | |||
*Gingival hyperplagia | |||
*Myalgia | |||
*Bronchitis, sinus congestion, dypsnea | |||
*Hemolytic anemia, thrombocytopenia | |||
*Extrapyramidal symptoms | |||
== | ==Pharmacology== | ||
*Onset of action = 2-3min (IV) | *Onset of action = 2-3min (IV) | ||
*Duration of action = 1-3hr (IV) | *Duration of action = 1-3hr (IV) | ||
*Half life: 3-5h | |||
*Metabolism: Hepatic | |||
*Excretion: Urine/feces | |||
==Mechanism of Action== | |||
*Class IV - Inhibits Ca influx | |||
**Slows AV nodal conduction | |||
==Comments== | |||
==See Also== | ==See Also== | ||
[[Antiarrhythmics]] | *[[Antiarrhythmics]] | ||
*[[Calcium Channel Blocker Toxicity]] | |||
*[[Atrial Fibrillation with RVR]] | |||
==References== | |||
<references/> | |||
[[Category: | [[Category:Pharmacology]] | ||
[[Category:Cardiology]] |
Latest revision as of 16:45, 7 September 2022
Administration
- Type: Calcium channel blocker
- Dosage Forms
- IV: 25 mg/5 mL and 50 mg/10 mL bottles
- Oral: 30 mg, 60 mg, 90 mg
- Routes of Administration: IV, PO
- Common Trade Names: Cardizem
Adult Dosing
Atrial fibrillation with rapid ventricular response (if hemodynamically stable)
- Loading dose = 0.25 mg/kg (max=20 mg) IV bolus over 2 minutes
- Can consider breaking down into 10 mg boluses in older patients to decrease risk of adverse reactions
- If ineffective after 15 minutes: 0.35mg/kg (max=25mg) over 2 minutes
- If effective: Start infusion at 5-15 mg/hr
- Consider 30mg IR PO or home dose to avoid need for a drip
Supraventricular tachycardia (if hemodynamically stable)
- Same as for atrial fibrillation with rapid ventricular response (see above)
Pediatric Dosing
- Contraindicated in pediatric patients <1yo
- See critical care quick reference for drug doses by weight
Special Populations
Pregnancy Rating
- Pregnancy Rating: C
Lactation risk
- Lactation: Does appear to diffuse into breast milk, but doses are typically not harmful to infants
Renal Dosing
- Adult: Not studied, use caution
- Pediatric: Not studied, use caution
Hepatic Dosing
- Adult: Not studied, use caution
- Pediatric: Not studied, use caution
Contraindications
- Allergy to drug/class
- Infants <1yo
- Wide-complex tachycardia due to bypass tract (e.g. WPW)
- Symptomatic severe hypotension
- Sick sinus syndrome/2nd or 3rd degree heart block if no pacemaker
- PO: acute MI and pulmonary congestion
- Ventricular tachycardia
- Caution if:
- Hypertrophic cardiomyopathy
- LV dysfunction
- Concomitant beta-blockade
- Hepatic/renal impairment
- Heart failure
Adverse Reactions
Serious
Common
- Peripheral edema
- Elevated LFTs
- Headache
- Dizziness
- Nausea/vomiting, diarrhea, contipation
- Flushing, vasodilation
- Gingival hyperplagia
- Myalgia
- Bronchitis, sinus congestion, dypsnea
- Hemolytic anemia, thrombocytopenia
- Extrapyramidal symptoms
Pharmacology
- Onset of action = 2-3min (IV)
- Duration of action = 1-3hr (IV)
- Half life: 3-5h
- Metabolism: Hepatic
- Excretion: Urine/feces
Mechanism of Action
- Class IV - Inhibits Ca influx
- Slows AV nodal conduction