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The goal of the current study was to evaluate whether SMOF lipid administration could be used as an adjuvant therapy to treat acute, moderate-to-severe carbamazepine poisoning.
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Among anticonvulsants, carbamazepine (CBZ) is considered one of the most commonly reported poisonings. Carbamazepine (CBZ) was approved for use as a primary anticonvulsant agent following its initial use for trigeminal neuralgia. Further indications for the drug included treatment for bipolar disorder, resistant schizophrenia, and pain syndromes.
The wide availability of carbamazepine increases the potential for overdose, either accidentally or intentionally. The American Association of Poison Control Centres reported 2,562 hazardous exposures to CBZ in 2020. In addition, CBZ was the most commonly used anti-epileptic drug, according to a recent study by the National Centre for Environmental and Clinical Toxicology Research, Cairo, Egypt.
CBZ works by blocking presynaptic voltage-gated sodium channels, thereby inhibiting the release of synaptic glutamate and other neurotransmitters.
Overdose of CBZ is clinically manifested by nystagmus, nausea, dysarthria, ataxia, sedation, delirium, mydriasis, ophthalmoplegia, and myoclonus. The serious clinical problems resulting from large overdoses of CBZ are cardiotoxicity, respiratory depression, apnea, seizures, and coma. Mortality from CBZ poisoning is uncommon.
Because there is no definitive antidote for carbamazepine poisoning, poison control centres recommend supportive therapy based on the patient's clinical condition and multiple-dose activated charcoal (MDAC) as a specific intervention for enhanced elimination. Nevertheless, the elimination of the drug from the body can be prolonged.
The scarcity of physiological antidotes for acute poisonings encourages toxicologists to supplement standard supportive treatment protocols with promising agents that tend to improve morbidity and mortality.
In this context, intravenous lipid emulsions (ILE) are mainly used as a source of energy and essential fatty acids in patients requiring parenteral nutrition. Apart from their nutritional value, lipid emulsion therapy is becoming increasingly popular in critical care settings as a treatment for toxicity with lipophilic agents, particularly when the standard remedies are ineffective.
Following the encouraging outcomes of using ILEs for the treatment of local anaesthetic systemic toxicity, subsequent studies reported the therapeutic effect of ILEs in acute poisonings with other xenobiotics. However, the evidence for the potential effectiveness of ILE in clinical toxicology consists mainly of case reports and experimental studies. In cases of CBZ poisoning, ILE was not evaluated using a randomised control trial (RCT).
ILE may be suitable for the treatment of CBZ toxicity due to its lipid solubility. To the best of our knowledge, the effect of ILE therapy on acute carbamazepine poisoning has not been studied sufficiently.
SMOF 20%, a blend of soybean oil, medium-chain triglycerides, olive oil, and fish oil, is a new lipid emulsion product that has shown better therapeutic results regarding parentral nutrition when compared with traditional ones such as Intralipid® 20%. It has been associated with decreased oxidative injury, improved liver function, and increased antioxidant activity
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40 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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