- benzalkonium chloride
This information is intended for use by health professionals
Dermax Therapeutic Shampoo
Benzalkonium Chloride 0.5% w/w
For the full list of excipients, see section 6.1.
Clear, pale yellow to straw coloured viscous shampoo.
For the topical treatment of pityriasis capitis and other seborrhoeic scalp conditions, where there is scaling and dandruff.
For adults, children and the elderly.
Use as a shampoo, daily if necessary, reducing the frequency of use to once or twice a week as the condition improves. Thereafter, occasional use may be necessary. Wet the hair. Apply a sufficient quantity of the shampoo to the scalp to produce a rich lather (approximately a quantity the size of a fifty pence piece for short hair, adjusting up depending on length/thickness of hair) and, with the tips of the fingers, rub in thoroughly. Rinse. If necessary, repeat the application and massage to produce a rich lather. Remove as much lather as possible with the hands, before rinsing thoroughly under running water.
Not to be used in cases of sensitivity to any of the ingredients.
Keep away from the eyes.
In case of irritation, or if there is no improvement after 4 weeks, or the scalp condition seems to look or feel worse, discontinue treatment and tell your doctor, pharmacist or nurse.
No special precautions.
Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.
There are no known toxic effects resulting from excessive use of the shampoo.
Pharmacotherapeutic group: Medicated Shampoos. ATC code: D11AC.
The surface active cationic germicide, benzalkonium chloride, is adsorbed on to dry skin scales, which are a feature of pityriasis capitis and other seborrhoeic scalp conditions. The scales are thereby loosened and attain a net positive charge. In the presence of the anionic foaming agent, sodium lauryl ether sulfate, the dandruff scales are then levitated into the negatively charged surface of the foam, and are thus washed from the hair.
The benzalkonium chloride also acts as a mild antiseptic which improves clinical performance where the condition is exacerbated by the presence of microbes. The major site of action against micro-organisms appears to be the cell membrane, where permeability is altered.
The effect of the shampoo is entirely superficial since it acts on the outer surface of the stratum corneum, treating the external manifestations of the recommended clinical indications. For this reason, no pharmacokinetic studies have been undertaken.
There are no preclinical data of relevance to the prescriber, which are additional to those already included in other sections of the SmPC.
Sodium lauryl ether sulfate
Dilute hydrochloric acid
Lauryldimonium hydroxypropyl hydrolyzed collagen
36 months in unopened container
Do not store above 25°C
Keep bottle in outer carton.
100 or 250 ml white high density polyethylene bottle with a polypropylene dispensing screw cap.
25 or 30 ml white high density polyethylene bottle with a polypropylene screw cap.
Not all pack sizes may be marketed.
Diomed Developments Limited
T/A Dermal Laboratories
18 May 2005 / 17 May 2010 (unlimited validity)
Tatmore Place, Gosmore, Hitchin, Herts, SG4 7QR
+44 (0)1462 458 866
+44 (0)1462 420 565