Benzabiol1.25 gm/5 ml

Benzabiol is a topical scabicide and pediculicide used for the following established indications:

• Scabies - treatment of infestation with the mite Sarcoptes scabiei. Benzabiol is included as a topical scabicide option in the WHO Model List of Essential Medicines and in standard dermatology treatment guidelines.
• Pediculosis (lice infestation) - treatment of head lice (Pediculus humanus capitis), body lice, and pubic/crab lice (Pthirus pubis).

Benzabiol is intended for external (topical) use only on the skin, hair, or scalp as directed; it has no approved internal/systemic indication.

Each unit volume of Benzyl Benzoate topical lotion/emulsion contains Benzyl Benzoate (USP/BP) as the active ingredient, most commonly formulated as a 25% w/v lotion or emulsion for adult use, in a suitable emulsifying base with preservatives. Diluted strengths (for example 12.5%) are prepared for pediatric use by mixing with water as directed by a physician or pharmacist.

Benzabiol is a topical antiparasitic agent used to treat scabies and lice (pediculosis). It is an ester of benzoic acid and benzyl alcohol that has direct toxic action against the mite Sarcoptes scabiei and lice.

Benzabiol is applied externally as a lotion or emulsion, typically after bathing, and is left in contact with the skin for a specified period before being washed off. It has been used for decades as an affordable, widely available topical scabicide/pediculicide, particularly in resource-limited settings.

Benzabiol belongs to the therapeutic class of topical scabicides and pediculicides (ectoparasiticides), agents used for the local treatment of skin infestations by mites or lice.

The precise mechanism of action of Benzyl Benzoate has not been fully elucidated, but it is believed to act directly on the nervous system of the parasite. Benzyl Benzoate is thought to be absorbed through the exoskeleton/cuticle of the mite or louse, disrupting nerve membrane function and producing paralysis and death of the parasite.

Following topical application, absorption of Benzyl Benzoate through intact skin is generally minimal, but percutaneous absorption increases when it is applied to broken, inflamed, or excoriated skin, over large body surface areas, or on the thinner skin of infants. Absorbed drug is metabolized largely by hydrolysis to benzoic acid and benzyl alcohol; benzoic acid is conjugated with glycine in the liver to form hippuric acid, which is excreted in the urine.

Benzabiol is for external use only.

• Bathe/wash the skin and allow it to dry and cool before applying Benzabiol.
• Apply an even layer of Benzabiol to the affected/whole-body area as directed, avoiding the eyes, mouth, nose, and other mucous membranes.
• Do not apply to broken, weeping, or infected skin.
• Allow Benzabiol to remain in contact with the skin for the recommended time before washing it off completely with soap and water.
• Wash hands immediately after application (unless the hands are part of the treated area).
• Change into clean clothing and bedding after treatment is completed.

Because Benzabiol is applied topically and systemic absorption through intact skin is minimal, clinically significant drug-drug interactions are uncommon. Systemic absorption can increase when Benzabiol is applied to broken or extensively inflamed skin, over large surface areas, or in infants, which could theoretically add to the effects of other agents absorbed through the skin at the same time.

As a general precaution, avoid applying other topical medicines, oils, or emollients to the same skin area at the same time as Benzabiol unless advised by a physician, since this may affect its local action or alter absorption.

The most common adverse effects of Benzabiol are local skin reactions, including:

• Skin irritation and a burning or stinging sensation, especially on first application, on thin/sensitive skin, or with prolonged contact time.
• Increased itching (pruritus) immediately after application.
• Redness (erythema) and contact dermatitis.

Rare but serious effects can occur if significant systemic absorption takes place (for example with use on broken skin, very large body-surface application, or in infants): central nervous system stimulation, including restlessness, tremor, or seizures. If any such symptoms occur, discontinue Benzabiol and seek medical attention promptly.

Pregnancy: Data on the use of Benzabiol in pregnancy are limited. Because some degree of transcutaneous absorption is possible, Benzabiol should be used during pregnancy only if clearly needed, applied to the smallest area necessary for the shortest effective duration, and only under the guidance of a physician who has weighed the potential benefit against any potential risk.

Lactation: It is not established whether Benzabiol or its metabolites are excreted in human breast milk. As a precaution, breastfeeding women should use Benzabiol only when clearly necessary, avoid applying it to the breast/nipple area, and consult a physician before use.

Benzabiol is for external use only and should never be swallowed or applied inside the mouth, nose, eyes, or genital mucosa.

• Benzabiol can cause noticeable skin irritation or a burning sensation, particularly on sensitive areas (groin, axillae, breasts) or with excessive contact time; strictly follow the prescribed concentration, application area, contact duration, and rinsing instructions to minimize irritation.
• Do not apply Benzabiol to broken, raw, weeping, or infected skin.
• For scabies, it is standard clinical practice to treat all household members and close physical contacts simultaneously, even if asymptomatic, and to wash clothing and bedding, to prevent re-infestation - this general infection-control measure should be followed alongside Benzabiol treatment.
• Use with particular caution and only under medical supervision in infants, young children, the elderly, and in anyone with extensive or broken skin, due to a higher risk of systemic absorption and irritation (see Use in Special Populations).
• If a formulation of Benzabiol contains flammable excipients (e.g., alcohol), keep away from open flame or heat sources during and shortly after application.

Accidental ingestion of Benzabiol, or excessive/prolonged skin application leading to significant systemic absorption, may cause nausea, vomiting, abdominal discomfort, and central nervous system stimulation (restlessness, tremor, or seizures in severe cases).

If overdose or accidental ingestion of Benzabiol is suspected, seek immediate medical attention or contact emergency services/a poison control center right away. Do not attempt home treatment or induce vomiting unless specifically instructed by a healthcare professional or poison control center.

Store at room temperature (below 30°C), away from light, heat, and moisture. Keep the container tightly closed and out of reach of children.

Infants and young children: See Pediatric Uses - use only under medical supervision, at reduced (diluted) strength, given a higher risk of skin irritation and systemic absorption.

Elderly: No specific dose adjustment of Benzabiol is established for elderly patients; use as for adults, with attention to skin fragility and closer monitoring for irritation.

Renal or hepatic impairment: Because systemic absorption of topically applied Benzabiol is normally minimal, no specific dose adjustment has been established; however, caution is warranted if extensive application or broken skin increases systemic exposure.

Pregnancy and lactation: See Pregnancy and Lactation.

A course of Benzabiol for scabies typically involves one to two applications (24 hours of skin contact each), as directed. For pediculosis, a single application to the scalp/hair with the recommended contact time is usual, with a repeat application after about 7-10 days sometimes advised to kill newly hatched lice.

Benzabiol should not be reapplied more frequently, or used for longer, than directed. If itching or signs of infestation persist for more than 2-4 weeks after correctly completed treatment, consult a physician rather than repeating treatment on one's own, since post-scabetic itch can persist even after successful treatment.

Scabicides; Pediculicides; Topical ectoparasiticides

Benzyl Benzoate exerts a direct neurotoxic effect on mites and lice, interfering with the parasite's nerve membrane function and leading to paralysis and death of the organism. This local, contact-dependent action allows Benzyl Benzoate to eliminate both the parasites and, with correctly timed application, their eggs on the skin or hair.

The safety and efficacy of Benzabiol in infants and very young children have not been well established, and there is a higher risk of skin irritation and systemic (percutaneous) absorption in this age group because of their thinner skin and larger skin-surface-to-body-weight ratio.

When Benzabiol is used in children, it should be at a physician-directed, diluted concentration (commonly around 12.5% for children roughly 2-12 years old, and further diluted for younger children), applied to the smallest necessary area, with close supervision. Use of Benzabiol in neonates and premature infants should be avoided unless specifically directed by a physician, and only with strict attention to dilution, application area, and contact time.