Potassium permanganate

How it works

It is an oxidising agent with antiseptic and astringent properties that helps dry out exudate and reduce bacterial load on weeping skin.

Prescribing in practice

• It must be diluted to a pale pink solution before use; concentrated solutions, undissolved crystals or tablets are corrosive and cause chemical burns.
• It is for external use only and stains skin, nails, fabrics, baths and surfaces brown.
• Soaks are typically used for a limited period until exudation settles, then stopped, as prolonged use can dry and irritate the skin.

Monitoring

Review the skin for reduced exudate and for signs of over-drying or irritation, discontinuing once the surface has settled.

Counselling the patient

• Always dilute fully to a pale pink colour and never apply neat or use undissolved tablets or crystals.
• It is for soaking the skin only and will stain skin, nails and anything it touches brown.
• Use only for the short period advised, as overuse dries the skin.

Evidence & guidelines

Potassium permanganate soaks are a long-standing recommended option for weeping and exudative skin conditions, supported by clinical experience and the SPC.