Approved Drug Label (PDF)
4
Contraindications
(additions
underlined)
Hypersensitivity reactions, including
anaphylactic reactions, have been reported with lidocaine. Lidocaine
hydrochloride is contraindicated in patients with a history of hypersensitivity
to local anesthetics of the amide type.
Lidocaine is contraindicated in patients with
Stokes-Adams syndrome, Wolff-Parkinson-White syndrome, or with severe degrees
of sinoatrial, atrioventricular, or intraventricular block.
5
Warnings and Precautions
PRECAUTIONS, DRUG INTERACTIONS
(section
revised, additions underlined)
Digitalis derivatives:
Monitor toxicity when lidocaine is used with
caution in patients with digitalis toxicity accompanied by supraventricular arrhythmia
and/or atrioventricular block (see Contraindications).
When lidocaine is administered
with other antiarrhythmic drugs such as amiodarone, phenytoin, procainamide, propranolol or quinidine,
the cardiac effects may be additive or antagonistic and toxic effects may
be additive.
Coadministration of
propranolol or cimetidine with lidocaine has been reported to reduce the clearance
of lidocaine from the plasma and may result in toxic accumulation of the drug.
Pharmacokinetic Interactions
Concomitant treatment
with drugs which are inhibitors of CYP1A2 and/or CYP3A4 has the potential to increase lidocaine plasma levels
by decreasing lidocaine clearance
and thereby prolonging the elimination half-life. Monitor toxicity when administering
lidocaine with CYP1A2 and/or CYP3A4 inhibitors.
Concomitant use of lidocaine
at steady-state concentrations of the CYP1A2 inhibitor fluvoxamine increases intravenous lidocaine plasma
AUC and Cmax by 71% and 22%, and decreases MEGX AUC and Cmax by 54% and
65%. Fluvoxamine decreases the plasma
clearance of lidocaine by 41%-60% and prolonged the mean half-life one hour.
Monitor toxicity when coadministering these medications.
Concomitant use of lidocaine
with propofol, a hypnotic agent and CYP3A4 inhibitor, may increase lidocaine plasma levels by reducing lidocaine
clearanc. Monitor toxicity when coadministering lidocaine with propofol.
Concomitant treatment
with drugs which are inducers of CYP1A2 and/or CYP3A4 (e.g., phenytoin) has the potential to decrease lidocaine
plasma levels and higher doses may be required.
Concomitant use of lidocaine
with a weak CYP1A2 and CYP3A4 inhibitor has been reported to increase lidocaine plasma levels by 24%
– 75% and may result in toxic accumulation of the drug. Monitor toxicity
when coadministering lidocaine with cimetidine.
Beta-adrenergic blockers
(e.g. propranolol): Concomitant use of lidocaine with beta- adrenergic blockers may increase lidocaine plasma
levels by decreasing hepatic blood flow and thereby decrease lidocaine clearance.
Monitor for toxicity when coadministering lidocaine with drugs that decrease
hepatic blood flow.
PRECAUTIONS, GENERAL
(subsection
revised, additions underlined)
If malignant hyperthermia
develops, discontinue administration immediately and institute therapeutic countermeasures as clinically indicated.
Lidocaine hydrochloride
should not be added to blood transfusion assemblies because of the possibilities
of pseudoagglutination or hemolysis.
PRECAUTIONS, NURSING MOTHERS
(section
revised, additions underlined)
Lidocaine is
present in human milk. Published studies have reported a range of lidocaine milk:
plasma ratios between 0.4-1.1. Limited data available on lidocaine’s effects on
the breastfed child have not revealed a consistent pattern of associated
adverse events. The development and health benefits of breastfeeding should be
considered along with the mother’s clinical need for lidocaine and any
potential adverse effects on the breastfed infant from lidocaine or from the
underlying maternal condition.
PRECAUTIONS, PREGNANCY
(additions
underlined)
Teratogenic Effects:
Reproduction studies have been
performed in rats at doses up to five times the maximum human dose and have
revealed no significant findings. There are, however, no adequate and
well-controlled studies in pregnant women. Because animal reproduction studies
are not always predictive of human response, physicians should carefully
consider the potential risks and benefits for each specific patient before
prescribing lidocaine hydrochloride.
Lidocaine may cross
the placental barrier.
WARNINGS
(subsection
revised, additions underlined)
Constant monitoring with an electrocardiograph
is essential to the administration of lidocaine hydrochloride intravenously. Signs
of excessive depression of cardiac conductivity, such as prolongation of the PR
interval, widening of the QRS interval and the appearance or aggravation of arrhythmias,
should be followed by prompt cessation of the intravenous infusion of this agent.
It is mandatory to have emergency resuscitative equipment and drugs immediately
available to manage adverse reactions involving cardiovascular, respiratory, or
central nervous systems. Central nervous system adverse reactions are
associated with venous plasma levels above 6.0 ?g free base per mL (see ADVERSE
REACTIONS).
Hypersensitivity, including
anaphylaxis, has been reported with lidocaine-containing solutions. Stop the infusion immediately if signs
of hypersensitivity develop.
In patients with sinus
bradycardia or incomplete heart block, the administration of lidocaine hydrochloride intravenously for the elimination
of ventricular ectopic beats without prior acceleration in heart rate (e.g.,
by isoproterenol or by electric pacing) may promote more frequent and serious
ventricular arrhythmias or complete heart block (see Contraindications).
Because lidocaine is
metabolized mainly in the liver and excreted by the kidneys, patients with renal or hepatic insufficiency may
be at increased risk for toxicity.
6
Adverse Reactions
(additions
underlined)
Nervous System
Disorders: respiratory depression and
arrest; unconsciousness; convulsions; tremors; twitching; vomiting; blurred or
double vision; drowsiness; dizziness; light-headedness; tinnitus; sensation of
heat, cold or numbness; euphoria; apprehension; agitation; confusional state;
paresthesia; dysarthria.
Cardiovascular System:
cardiovascular arrest; bradycardia which may lead to cardiac arrest;
hypotension, Ventricular fibrillation, Ventricular tachycardia, Ventricular arrhythmia,
Asystole.
Gastrointestinal
Disorders: Hypoesthesia oral, Nausea,
Hematologic Effects:
methemoglobinemia.
Psychiatric
Disorders: Disorientation
7
Drug Interactions
(additions
underlined)
Lidocaine is
incompatible with the following due to precipitate formation (includes but is not
limited to):
• Amphotericin
• Cephazolin sodium
• Phenytoin sodium
Parenteral drug products should
be inspected visually for particulate matter and discoloration prior to
administration whenever solution and container permit. Do not administer
unless solution is clear and seal is intact. Use of a final filter is
recommended during administration of all parenteral solutions, where possible.
Lidocaine must not be infused simultaneously through the same tubing
with other medicinal products without first verifying their
compatibility.
8
Use in Specific Populations
Hepatic Impairment
(additions
underlined)
Is likely to decrease
clearance and increase exposure level of lidocaine. Administer lidocaine at a
lower maintenance
infusion rate with close monitoring of toxicity in patients with hepatic
impairment.
Pediatrics
(additions
underlined)
Clinical studies to establish
pediatric dosing schedules have not been conducted. The bolus dose should be
repeated if infusion is not initiated within 15 minutes of the initial bolus
dose.
Renal Impairment
(additions
underlined)
In patients with severe renal impairment (creatinine
clearance eGFR less than 30 mL/min/1.73 m2), administer lidocaine at lower
maintenance infusion rate with close toxicity monitoring of toxicity.