The ciclopirox olamine is a synthetic derivative of ciclopirox, an antifungal agent. When combined with ethanolamine, it exhibits greater water solubility and improved bioavailability. It is among the few broad-spectrum antifungals capable of acting against dermatophytes, yeasts including Candida and Malassezia, and certain moulds. Its chemical structure, derived from hydroxypyridone, gives it a particular affinity for metal ions, notably iron, which it chelates, thereby disrupting microbial metabolism. In addition to its antifungal properties, ciclopirox olamine also exhibits antibacterial and anti-inflammatory activity, making its use particularly relevant for managing dermatoses where microbial proliferation and inflammation coexist, such as seborrhoeic dermatitis.
From a hair-care standpoint, ciclopirox olamine is particularly effective in combating dandruff and seborrhoeic dermatitis.
As a reminder, dandruff are primarily associated with the proliferation of yeasts of the genus Malassezia. Their proliferation on the scalp results in the breakdown of sebum lipids into irritating fatty acids, which are responsible for local inflammation, occasionally accompanied by itching, and also accelerates epidermal desquamation. Dandruff represents a mild, localized form of seborrhoeic dermatitis, a more widespread inflammatory skin condition with an identical pathogenesis.
Ciclopirox olamine acts at multiple levels to target dandruff and seborrhoeic dermatitis. As mentioned above, this active ingredient exerts a direct antifungal activity against yeasts Malassezia by disrupting their cellular metabolism. Ciclopirox olamine works by chelating iron, a metal essential for the activity of numerous fungal enzymes—such as cytochromes, catalases and peroxidases—involved in mitochondrial respiration and oxidative stress management. By inhibiting these metal-dependent enzymes, ciclopirox induces an intracellular iron deficiency in the fungi, compromising their viability.
In parallel, ciclopirox olamine possesses anti-inflammatory activity that complements its antifungal action. It blocks certain inflammatory pathways, notably those derived from arachidonic acid, by inhibiting cyclooxygenase and 5-lipoxygenase. This action of ciclopirox olamine enables it to reduce the production of pro-inflammatory prostaglandins and leukotrienes, the molecules responsible for the redness, itching and irritation associated with dandruff and seborrhoeic dermatitis. Moreover, studies have shown that it decreases the release of pro-inflammatory cytokines, such as IL-1β, IL-6 and TNF-α, enhancing its soothing effect on the scalp while minimising the risk of recurrence.
The effects of ciclopirox olamine on dandruff and seborrhoeic dermatitis have been investigated in numerous trials. The table below presents some of the results obtained.