Please see below for new safety information regarding drug interactions with warfarin.
CARNITOR® (levocarnitine) Tablets, Oral Solution, and Sugar-Free Oral Solution are indicated in the treatment of primary systemic carnitine deficiency.
CARNITOR® (levocarnitine) Injection is indicated for the prevention and treatment of carnitine deficiency in patients with end stage renal disease who are undergoing dialysis.
CARNITOR® (levocarnitine) Injection is also indicated for the acute and chronic treatment of patients with an inborn error of metabolism which results in secondary carnitine deficiency.
The safety and efficacy of oral levocarnitine has not been evaluated in patients with renal insufficiency. Chronic administration of high doses of oral levocarnitine in patients with severely compromised renal function or in ESRD patients on dialysis may result in accumulation of the potentially toxic metabolites, trimethylamine (TMA) and trimethylamine-N-oxide (TMAO), since these metabolites are normally excreted in the urine.
CARNITOR® (levocarnitine) Oral Solution and CARNITOR® SF (levocarnitine) Sugar-Free Oral Solution are for oral/internal use only.
Reports of INR increase with the use of warfarin have been observed. It is recommended that INR levels be monitored in patients on warfarin therapy after the initiation of treatment with levocarnitine or after dose adjustments.
Gastrointestinal reactions may result from a too rapid consumption of carnitine. CARNITOR® (levocarnitine) Oral Solution and CARNITOR® SF (levocarnitine) Sugar-Free Oral Solution may be consumed alone, or dissolved in drinks or other liquid foods to reduce taste fatigue. They should be consumed slowly and doses should be spaced evenly throughout the day to maximize tolerance.
Seizures have been reported to occur in patients, with or without pre-existing seizure activity, receiving either oral or intravenous levocarnitine. In patients with pre-existing seizure activity, an increase in seizure frequency and/or severity has been reported.
Various mild gastrointestinal complaints have been reported during the long-term administration of oral L- or D,L-carnitine; these include transient nausea and vomiting, abdominal cramps, and diarrhea. Mild myasthenia has been described only in uremic patients receiving D,L-carnitine. Gastrointestinal adverse reactions with CARNITOR® (levocarnitine) Oral Solution or CARNITOR® SF (levocarnitine) Sugar-Free Oral Solution dissolved in liquids might be avoided by a slow consumption of the solution or by a greater dilution. Decreasing the dosage often diminishes or eliminates drug-related patient body odor or gastrointestinal symptoms when present. Tolerance should be monitored very closely during the first week of administration, and after any dosage increases.
Transient nausea and vomiting have been observed. Less frequent adverse reactions are body odor, nausea, and gastritis. An incidence for these reactions is difficult to estimate due to the confounding effects of the underlying pathology.