Coal tar is a product extracted from coal, and it works by shedding the outermost layer of skin and slowing down the growth of new skin cells. It is therefore used in skin conditions like seborrhoeic dermatitis and psoriasis, as it reduces scaling, flaking of the skin to overall reduce itching too.
Coal tar is available as topical preparations like shampoo and cream. For psoriasis of the scalp, use twice weekly up to once daily required. Apply to scalp and until lather, wait for 5 minutes and rinse thoroughly.
For Seborrhoeic dermatitis, shampoo the scalp, leave for 5 minutes and rinse thoroughly. Use up to twice weekly if required.
Common side effects of Coal tar include skin or scalp irritation, and staining.
Common dosing schedule:
Refer to the product insert for the particular instruction.
This schedule is for reference only, adjustments may be made according to individual needs.
Some common medications Coal tar may interact with:
Coal tar has no known significant interactions with common medications.
In Hong Kong, Coal tar can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.
For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk
Need more information?
For detailed information about the use of Coal Tar in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.
Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.
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