Crotamiton is an antipruritic and scabicidal agent used to treat skin infestations and severe itching symptoms.
Crotamiton is a topical medication belonging to the antipruritic and scabicidal class. It is primarily used on the skin to relieve itching and to treat a common parasitic skin infection. In Hong Kong, crotamiton is available in several products, the most well-known being Eurax.
The principal product that contains crotamiton in the Hong Kong market is Eurax. Eurax is sold as a cream or lotion that can be applied to the affected area. The preparation is offered in a single strength of 10 % w/w crotamiton, and it is marketed under both the brand name Eurax and as a generic cream. While Eurax is the only widely registered brand, pharmacies may also stock unbranded crotamiton creams that meet the same specifications set by the Department of Health. All of these formulations are intended for external use only.
These conditions are common in both children and adults, and the ingredient is approved for use on most areas of the body except the eyes, mouth and broken skin.
When applied to the skin, crotamiton spreads over the surface and interferes with the sensory nerves that signal itch. At the same time, it has a toxic effect on the scabies mite, disrupting its ability to survive on the skin. Because the action is local, the effect is felt within a short period after application, and relief usually continues as long as the cream remains on the skin.
Most people experience little or no irritation. When side effects do occur, they are usually mild and short-lived, such as:
If these sensations persist or become uncomfortable, stop using the product and refer to the label for further guidance.
Rarely, an allergic reaction may develop. Warning signs include:
These symptoms require immediate medical attention. Do not wait for the next appointment; go to the nearest Accident & Emergency department.
People with a known hypersensitivity to crotamiton or any other ingredient in the cream should avoid its use. Pregnant or breastfeeding individuals are advised to discuss topical treatments with a qualified health professional, as the safety of crotamiton in these groups has not been fully established. Individuals with extensive skin damage, open wounds or severe eczema should also use the product only after confirming it is appropriate for their condition.
Crotamiton is applied externally, so it does not usually interact with oral medicines. However, the following situations merit attention:
For a complete list of possible interactions, refer to the specific product’s information leaflet.
Store Eurax at room temperature, away from direct sunlight and moisture. Keep the container tightly closed when not in use. The cream is intended for short-term relief; prolonged daily application without professional guidance is not recommended. Always follow the instructions printed on the packaging, as each product may have slight variations in recommended frequency and duration.
For detailed usage, dosing, administration, refer to your specific medication’s information.
Pruritus: An uncomfortable sensation that provokes the desire to scratch.
Scabies: A skin condition caused by tiny mites that burrow into the upper layer of skin, leading to intense itching.
Topical: Applied directly to a specific area of the skin rather than taken by mouth or injection.
This article offers general educational information about crotamiton as an active substance used in various medicines. Its purpose is to help patients better understand the ingredient and the conditions it is used to treat. It is not a substitute for professional medical advice or for the specific instructions provided with individual products. Medicines containing crotamiton may differ in formulation, strength, and directions for use. Always consult the labeling of your particular medication and follow your healthcare provider’s guidance for complete information on proper use, dosage, and safety.
