Aluminium chloride in water: what patients should know

Water acts as the carrier that distributes the active ingredient across the application area. Follow the product or prescriber's directions because the formulation and intended site affect how it should be used.

Once applied, aluminium chloride interacts with moisture near the openings of sweat ducts and forms temporary plugs that limit sweat reaching the surface. This is why it is used in stronger antiperspirants rather than ordinary deodorants, which mainly target odour.

The water-based solution is acidic. Extra surface moisture can increase irritation, so applying it to thoroughly dry skin matters. Stinging does not show that the product is working better; it can signal irritation or application to vulnerable skin.

Use only on the body area named on the label or by your clinician. Let the skin dry fully first, apply a thin layer, allow it to dry, and wash your hands afterwards. Avoid the eyes, mouth, genital skin, open cuts, inflamed patches, and skin that has just been shaved or treated.

Do not dilute, transfer, or mix the product unless a pharmacist or prescriber has given exact instructions. If mild irritation develops, stop temporarily and seek advice about application frequency, skin preparation, or a different formulation before restarting.

Rinse the area and stop using the solution if burning is strong, redness keeps spreading, or blistering, swelling, weeping, or marked tenderness appears. Arrange clinical advice if irritation persists after the product is removed or repeatedly returns with careful use.

Get urgent help for swelling of the lips, tongue, or throat, trouble breathing, faintness, or a rapidly developing widespread rash. If the liquid enters an eye, rinse continuously with clean lukewarm water and obtain prompt advice if pain or visual disturbance continues.

Ask which strength and schedule fit the treatment area, what to do around shaving or hair removal, and whether eczema, broken skin, or another topical medicine changes how you should apply it. Also ask how to distinguish expected mild tingling from a reaction that means you should stop.