Lena Savoie
Benzyl alcohol is a chemical compound with antiseptic and bacteriostatic properties, commonly used in consumer products like cosmetics, perfumes, and foods. It is also used as a prescription drug for treating head lice. Benzyl alcohol has been associated with toxicity in neonates, especially those who are premature or of low birth weight. The toxicity is caused by the accumulation of benzoic acid (a metabolite of benzyl alcohol) in the body, which can exceed the capacity of the immature liver or kidneys to detoxify it through glycine conjugation. This can lead to severe toxicity and even death in some cases. The immature metabolic capacities of neonates, particularly their limited ability to convert benzoic acid to hippuric acid, is a critical factor in the development of benzyl alcohol toxicity.
| Characteristics | Values |
|---|---|
| Cause of toxicity | Larger doses per kilogram than for adults |
| Symptoms | Respiratory distress, gasping respirations, central neural depression, seizures, intracranial hemorrhage, delayed mental development, other neurological deficits |
| Mechanism | Benzyl alcohol metabolizes into benzoic acid, which is then supposed to be converted into hippuric acid and excreted in the urine. However, infants have a limited ability to metabolize benzyl alcohol into benzoic acid, and also have a relative inability to convert benzoic acid into hippuric acid due to glycine deficiency. This leads to an accumulation of benzoic acid, which causes toxicity. |
| Cases | Sixteen cases of preterm neonatal death were associated with benzyl alcohol used as a bacteriostatic agent in isotonic saline used to flush intravascular catheters. |
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What You'll Learn
- Benzyl alcohol is a chemical compound with antiseptic properties
- Benzyl alcohol is a major component of tolu balsam and benzoin
- Benzyl alcohol is associated with delayed mental development in low-birth-weight infants
- Benzyl alcohol toxicity may be due to larger doses per kilogram than for adults
- Benzyl alcohol toxicity can be caused by maternal exposure during pregnancy
Benzyl alcohol is a chemical compound with antiseptic properties
Benzyl alcohol is a chemical compound with antiseptic and bacteriostatic properties. It is commonly used in various consumer products, including foods, cosmetics, perfumes, and medications. Benzyl alcohol was approved as a prescription drug in 2003 for treating head lice, and it is also used as an antiseptic in medicinal products.
Benzyl alcohol has been associated with toxicity in neonates, especially those who are premature or of low birth weight. The toxicity is caused by the accumulation of benzoic acid, a metabolite of benzyl alcohol, in the body due to the immature liver and kidney's limited ability to detoxify and excrete it. Benzyl alcohol is metabolized to benzoic acid, which is then conjugated with glycine in the liver to form hippuric acid, which is excreted in the urine. However, preterm neonates have a deficient hippuric acid formation process, leading to a buildup of benzoic acid.
The immature metabolic capacities of neonates, particularly preterm babies, result in a higher ability to metabolize benzyl alcohol to benzoic acid compared to term neonates. This increased metabolism may be due to a higher volume of distribution, lower protein binding, or differences in enzyme activity. The accumulation of benzoic acid can cause severe toxicity and even death in neonates. Symptoms of benzyl alcohol toxicity in neonates include respiratory distress, central neural depression, seizures, and intracranial hemorrhage.
The toxicity of benzyl alcohol in neonates has been observed in clinical settings, with improved survival rates in intensive care units following the discontinuation of benzyl alcohol solutions for low-weight infants. Additionally, fatal cases of benzyl alcohol poisoning in premature neonates have been reported, indicating the potential for toxicity even at lower doses. Therefore, the safe use of benzyl alcohol in medicinal products for neonates remains a subject of ongoing research and evaluation.
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Benzyl alcohol is a major component of tolu balsam and benzoin
Benzyl alcohol is a colourless liquid with a pleasant aromatic odour. It is a major component of tolu balsam and benzoin. Tolu balsam, also known as Balsam of Tolu, is a fragrant and flavourful substance with mild antiseptic and expectorant properties. It is commonly used in pharmaceutical preparations, particularly as a syrup for treating coughs and respiratory conditions. Tolu balsam is also an ingredient in compound benzoin tincture, which is used to treat bedsores, cracked skin, and minor cuts.
Benzyl alcohol is a chemical compound with bacteriostatic and antiseptic properties. It is commonly used in various consumer products, including foods, cosmetics, perfumes, and household items. It is also used in medical settings as a bacteriostatic preservative at low concentrations in intravenous medications, topical creams, and drugs. Benzyl alcohol was approved as a prescription drug for treating head lice and is the active ingredient in some lotions and shampoos.
The use of benzyl alcohol, however, has been associated with toxicity in neonates, especially those who are premature or of low birth weight. Studies have shown that benzyl alcohol solutions may contribute to improved survival rates in infants weighing less than 1 kg when used in intravascular catheters. However, toxicity can occur due to the relative inability of neonates to metabolise benzyl alcohol and its metabolite, benzoic acid, effectively. This can lead to a build-up of benzoic acid, resulting in severe toxicity and, in some cases, death.
The symptoms of benzyl alcohol toxicity in neonates include respiratory distress, central neural depression, seizures, and intracranial hemorrhage. Additionally, benzyl alcohol has been linked to delayed mental development and other neurological deficits in low-birth-weight infants. The risk of toxicity is higher in preterm babies due to their increased ability to metabolise benzyl alcohol into benzoic acid. The accumulation of benzoic acid can lead to severe health consequences.
Benzyl alcohol is also associated with allergic reactions in some individuals. It is a known allergen in Balsam of Peru, a naturally occurring fragrance, and can cause cross-reactions in patients with allergies to other substances. Overall, while benzyl alcohol has useful applications in various industries, it poses a risk of toxicity in neonates and certain vulnerable individuals.
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Benzyl alcohol is associated with delayed mental development in low-birth-weight infants
Benzyl alcohol is a chemical compound with bacteriostatic and antiseptic properties. It is commonly used in various consumer products, including foods, cosmetics, and perfumes. While benzyl alcohol has been approved for use in certain applications, its potential toxicity, especially in vulnerable populations such as neonates, has been a concern.
In neonates, particularly those who are premature or of low birth weight, benzyl alcohol metabolism and elimination can be impaired. This is due to their immature metabolic capacities and the relative inability to convert benzoic acid, a metabolite of benzyl alcohol, into hippuric acid. The accumulation of benzoic acid can lead to severe toxicity and even death, as reported in some cases.
Several studies have investigated the impact of benzyl alcohol exposure on neonatal health. One study by Benda et al. (1986) and Sreenan et al. (2001) found an association between benzyl alcohol exposure and delayed mental development in low-birth-weight infants. The mechanism may be related to benzyl alcohol's neurotoxic effects, as it is classified as a developmental neurotoxin. Additionally, the toxicity may be due to larger doses per kilogram than those typically administered to adults, overwhelming the immature liver or kidney's detoxification capabilities.
Furthermore, the discontinuation of benzyl alcohol solutions in neonatal intensive care units has resulted in a significant improvement in the survival rate of infants weighing less than 1 kg. This provides further evidence of the potential toxicity of benzyl alcohol in this vulnerable population.
It is important to note that the toxicity of benzyl alcohol in neonates may be influenced by various factors, including individual metabolic capacities and the presence of other underlying conditions. Therefore, while benzyl alcohol may be safe for use in some populations, its potential toxicity in neonates, especially those who are premature or of low birth weight, warrants careful consideration and further research.
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Benzyl alcohol toxicity may be due to larger doses per kilogram than for adults
Benzyl alcohol is a chemical compound with bacteriostatic and antiseptic properties. It is a major constituent of tolu balsam and benzoin. It is also commonly used in various consumer products, including foods, cosmetics, and perfumes. Benzyl alcohol can cause toxicity in neonates, especially those who are premature or of low birth weight.
Benzyl alcohol toxicity in neonates may be due to larger doses per kilogram than in adults. The immature metabolic capacities of infants result in a limited ability to metabolize benzyl alcohol into its metabolite, benzoic acid, and subsequently into hippuric acid, which can be excreted in the urine. This process is known as the benzyl alcohol/benzoic acid detoxification process. Preterm neonates, in particular, have been found to have deficient hippuric acid formation, leading to an accumulation of benzoic acid in the body.
The relative inability to convert benzoic acid to hippuric acid may be related to glycine deficiency. Benzyl alcohol is metabolized into benzoic acid, which then needs to be conjugated with glycine in the liver to form hippuric acid. If the liver or kidney's capacity for detoxification through this process is exceeded, it can lead to severe toxicity and even death.
Studies have shown that larger percentages of benzyl alcohol doses were found in the urine of preterm babies as benzoic acid, while less hippuric acid appeared in their urine compared to term newborns. This confirms that the detoxification process is poorly developed in premature neonates. Additionally, toxicity may be related to population-specific differences in pharmacokinetics or pharmacodynamics, as neonates may not be able to clear excipients in the same way or at the same rate as adults.
Furthermore, benzyl alcohol has been associated with delayed mental development and other neurological deficits in low birth weight infants. Toxic symptoms displayed by infants include respiratory distress, central neural depression, seizures, and intracranial hemorrhage.
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Benzyl alcohol toxicity can be caused by maternal exposure during pregnancy
Benzyl alcohol is a chemical compound with bacteriostatic and antiseptic properties. It is a common ingredient in consumer products like foods, cosmetics, and perfumes. Benzyl alcohol is also a major constituent of tolu balsam and benzoin. While benzyl alcohol has various applications, its use during pregnancy may lead to toxicity in neonates.
Benzyl alcohol toxicity in neonates can occur due to maternal exposure during pregnancy. Certain essential oils, such as mustard essential oil, contain ethyl acetate, a known human developmental neurotoxin. Benzyl alcohol, another constituent of essential oils, shares this neurotoxic property. When pregnant women are exposed to such essential oils, the toxins can be transferred to the embryo or fetus, leading to potential developmental issues.
The immature metabolic capacities of infants, including neonates, contribute to their limited ability to metabolize benzyl alcohol effectively. This results in an accumulation of benzoic acid, a metabolite of benzyl alcohol, which can lead to severe toxicity and even death in preterm infants. The relative inability to convert benzoic acid to hippuric acid, which is then excreted in the urine, is believed to be related to glycine deficiency.
Studies have shown that preterm neonates exhibit greater accumulation of benzoic acid in their serum compared to term neonates. This indicates that the detoxification process of converting benzyl alcohol to benzoic acid, and then to hippuric acid, is not fully developed in preterm infants. As a result, they may experience toxic symptoms, including respiratory distress, central neural depression, seizures, and intracranial hemorrhage.
Furthermore, the use of benzyl alcohol in medicinal products for neonates has been associated with toxicity. The European Medicines Agency (EMA) has proposed tolerance limits for benzyl alcohol, recognizing its potential toxicity in this vulnerable population. The STEP (Safety and Toxicity of Excipients for Paediatrics) repository aims to compile information on the safety and toxicity of excipients like benzyl alcohol to improve pharmacotherapy in neonates.
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Frequently asked questions
Benzyl alcohol is a chemical compound with bacteriostatic and antiseptic properties. It is commonly used in various consumer products like foods, cosmetics, and perfumes.
Benzyl alcohol is converted to benzoic acid in the body. Preterm neonates have a limited ability to metabolise benzoic acid into hippuric acid, which can be excreted in the urine. This leads to a build-up of benzoic acid in the body, which may cause toxicity and even death.
Symptoms of benzyl alcohol toxicity in neonates include respiratory distress, central neural depression, seizures, and intracranial hemorrhage. It has also been associated with delayed mental development and other neurological deficits in low birth weight infants.
