Medicine overview
Indications of Tetrasol
Tetrasol is a topical scabicide (thiocarbamate derivative) indicated for the treatment of scabies caused by the mite Sarcoptes scabiei.
- Established use: Treatment of scabies in adults and children, applied as a whole-body topical preparation (solution or medicated soap), as part of standard scabies management protocols.
- Adjunct measures: Tetrasol therapy is most effective when combined with simultaneous treatment of close contacts and household members, and thorough washing of bedding and clothing, to prevent reinfestation.
- Not established: Tetrasol is not established or recommended for the treatment of head lice (pediculosis) or other non-scabies skin infestations; it should not be used for indications outside topical scabies treatment.
Composition
Description
Tetrasol is a thiocarbamate compound structurally related to disulfiram, formulated as a topical scabicide. It is applied externally to the skin as a soap, lotion, or emulsion to eradicate the scabies mite (Sarcoptes scabiei) and its eggs.
Tetrasol is not intended for internal (oral) use and is applied strictly to intact skin under medical guidance.
Therapeutic Class
Topical scabicide / antiparasitic agent (thiocarbamate derivative); Tetrasol belongs to the ectoparasiticide class of dermatological agents.
Pharmacology
Monosulfiram is a thiocarbamate ester that is chemically related to disulfiram. Its precise scabicidal mechanism is not fully elucidated, but it is believed to act by direct contact toxicity to the scabies mite (Sarcoptes scabiei) and its eggs following topical application, disrupting the parasite's cellular metabolism.
Monosulfiram can be absorbed to a variable degree through the skin, particularly if applied over large areas of broken or inflamed skin. Once systemically absorbed, Monosulfiram (or its breakdown products) can inhibit the enzyme aldehyde dehydrogenase, in a manner similar to disulfiram, which is the basis for its clinically important interaction with alcohol.
Dosage & Administration of Tetrasol
Adult Dose
Tetrasol is applied topically as a soap or lotion to the entire body surface from the neck down (including areas not visibly affected, since mites can be present in apparently normal skin), typically once daily for 2-3 consecutive days as directed by the treatment protocol, then washed off after the recommended contact time. A course may be repeated after about one week if live mites persist.
Pediatric Dose
Used in children under medical supervision with the same whole-body application principle; concentration/duration of contact may be adjusted downward in young children and infants to reduce systemic absorption. See Use in Special Populations.
Administration Notes
- For external/topical use only; not for oral or mucosal use.
- Apply to the entire body surface from the neck down, not just visibly affected areas.
- Avoid contact with the eyes, mucous membranes, and open or broken skin.
- Treat all close contacts and household members simultaneously, and wash bedding and clothing, per standard scabies management protocols, to prevent reinfestation.
- Strictly avoid alcohol consumption (oral, and topical/cosmetic alcohol-containing products applied to skin) during treatment with Tetrasol and for several days afterward. See Interactions.
Administration of Tetrasol
Tetrasol is for external/topical use only. Apply evenly over the whole body (excluding the face and scalp unless specifically directed), avoiding the eyes, mouth, and mucous membranes, and rinse off after the instructed contact time.
Interaction of Tetrasol
Alcohol (disulfiram-like reaction): Tetrasol is structurally related to disulfiram and can be absorbed systemically through the skin. Concurrent consumption of alcohol (oral alcohol, or alcohol-containing topical/cosmetic products applied to the skin) during treatment with Tetrasol, or for several days afterward, may precipitate a disulfiram-like reaction — flushing, tachycardia, nausea, vomiting, and hypotension. Patients must strictly avoid all alcohol intake and alcohol-containing skin products during and for a period after treatment.
Other formal drug-drug interaction studies with Tetrasol are limited; use with other topical agents on the same skin area should be discussed with a physician.
Contraindications
Monosulfiram is contraindicated in patients with known hypersensitivity to Monosulfiram or any component of the formulation.
Side Effects of Tetrasol
- Local skin irritation, erythema (redness), or a rash at the site of application
- Dizziness, headache, or fatigue (particularly if systemic absorption occurs)
- Disulfiram-like reaction (flushing, tachycardia, nausea, hypotension) if alcohol is consumed during treatment — see Interactions
- Rarely, severe hypersensitivity skin reactions have been reported with Tetrasol use
Pregnancy & Lactation
Data on the use of Tetrasol during pregnancy and breastfeeding are limited. As with other topical agents with potential for systemic absorption, Tetrasol should be used during pregnancy or lactation only if clearly needed and if the potential benefit justifies the potential risk to the fetus or infant; consult a physician before use in these situations.
Precautions & Warnings
- Tetrasol is for external/topical use only; avoid contact with the eyes, mucous membranes, and open or broken/inflamed skin.
- Apply to the entire body surface as directed, not only to visibly affected areas, since scabies mites can be present in normal-appearing skin.
- Strictly avoid oral alcohol intake and alcohol-containing topical/cosmetic products during treatment with Tetrasol and for several days after completing treatment, due to the risk of a disulfiram-like reaction. See Interactions.
- Treat close contacts and household members simultaneously, and wash all bedding, clothing, and towels, per standard scabies management protocols to prevent reinfestation.
- If irritation, rash, or signs of hypersensitivity develop, discontinue Tetrasol and consult a physician.
Overdose Effects of Tetrasol
Excessive or prolonged application of Tetrasol beyond the recommended area, duration, or frequency may increase systemic absorption and the risk of adverse effects, including a disulfiram-like reaction if alcohol is also present. In case of accidental ingestion or suspected overdose/overexposure to Tetrasol, seek immediate medical attention or contact a poison control center; do not attempt unsupervised home treatment.
Storage Conditions
Store at room temperature (below 30°C), away from light and moisture. Keep out of reach of children.
Use In Special Populations
Pediatric Use
Tetrasol has been used in children under medical supervision for scabies treatment; however, safety and efficacy in infants and young children are not as well established as in adults, and concentration/contact duration should be adjusted downward with close medical supervision to minimize systemic absorption. Use in neonates and infants should only be under direct physician guidance.
Geriatric Use
No specific dose adjustment is established for elderly patients; apply with the same precautions regarding skin integrity and avoidance of alcohol.
Renal/Hepatic Impairment
No well-established dose-adjustment data exist for Tetrasol in renal or hepatic impairment, given its topical route of administration; use with caution and physician guidance if systemic absorption is a concern.
Duration Of Treatment
A typical course of Tetrasol involves application for 2-3 consecutive days, with a possible repeat course after about one week if live mites persist, as directed by a physician. Treatment duration should not be extended beyond what is advised without medical guidance.
Drug Classes
Ectoparasiticide; Topical scabicide (thiocarbamate derivative)
Mode Of Action
Pediatric Uses
Tetrasol may be used in children for scabies treatment under medical supervision, with careful attention to concentration, application area, and contact duration to reduce systemic absorption; safety and efficacy in infants and very young children are not as firmly established as in adults, so pediatric use should always be physician-directed.
Frequently Asked Questions
Q: What is Tetrasol 25% Solution used for?
A: Tetrasol 25% Solution is a topical scabicide used to treat scabies, an itchy skin infestation caused by the mite Sarcoptes scabiei. It is applied to the entire body surface as a soap, lotion, or emulsion.
Q: Can I drink alcohol while using Tetrasol 25% Solution?
A: No. Tetrasol 25% Solution is structurally related to disulfiram and can be absorbed through the skin. Consuming alcohol (oral, or alcohol-containing skin/cosmetic products) during treatment with Tetrasol 25% Solution, or for several days afterward, can cause a disulfiram-like reaction with flushing, rapid heartbeat, nausea, and low blood pressure. Strictly avoid alcohol during and after treatment.
Q: How should I apply Tetrasol 25% Solution?
A: Apply Tetrasol 25% Solution to the entire body from the neck down, including areas that do not look affected, since mites can hide in normal-appearing skin. Avoid the eyes, mouth, and mucous membranes, and wash it off after the time period directed by your physician or the product instructions.
Q: Is Tetrasol 25% Solution safe to use during pregnancy or breastfeeding?
A: Data are limited. Tetrasol 25% Solution should be used during pregnancy or breastfeeding only if clearly needed and if the potential benefit outweighs the potential risk; consult your physician before use.
Q: Do other household members need treatment too?
A: Yes. To prevent reinfestation, close contacts and household members should be treated simultaneously per standard scabies management protocols, and all bedding, clothing, and towels should be washed.
Q: What should I do if I accidentally swallow Tetrasol 25% Solution or use too much?
A: Seek immediate medical attention or contact a poison control center. Do not attempt to treat an overdose or accidental ingestion of Tetrasol 25% Solution at home without medical advice.
Disclaimer
The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.
