What should you know about prescription deodorant for excessive sweating?

The term can describe a prescription-strength antiperspirant rather than a product that only covers odour. Aluminium-based ingredients form temporary plugs near the openings of sweat ducts, so less sweat reaches the surface. The effect is local: it does not remove the underlying tendency to sweat.

A clinician may suggest this approach for underarms, hands, feet, or another area affected by excessive sweating. Irritation, stinging, dryness, or a rash can occur, especially on damp or freshly shaved skin. Excessive sweating can also have causes that need assessment, including heat exhaustion, hyperthyroidism, hypoglycaemia, or obstructive sleep apnoea.

Follow the product instructions and the prescriber’s directions. Apply a thin layer to completely dry, intact skin, commonly before sleep when sweat production is lower. Wash the area in the morning unless you were told to leave the product on, and avoid applying it immediately after shaving or bathing if your skin is sensitive.

Use only the amount advised and keep the product away from eyes, broken skin, and mucous membranes. If burning or a persistent rash develops, stop and contact the prescriber for advice. Do not share prescription products. If topical treatment does not give enough relief, a clinician can discuss options such as iontophoresis, Botox for sweating, or microwave sweat gland treatment, depending on the body area and your health.

Arrange a medical review if sweating is new, severe, occurs during sleep, affects one side, or comes with weight change, tremor, fever, dizziness, fainting, chest discomfort, or breathlessness. Seek urgent help for heavy sweating with confusion, collapse, severe weakness, or signs of overheating or low blood sugar.

Contact a clinician promptly if the prescribed product causes marked swelling, blistering, or worsening pain. A review can also help distinguish sweating that is limited to particular areas from sweating linked to a medicine or another health condition.

Ask which body areas the product is suitable for, how often to apply it, what to do after irritation, and when to review progress. Tell the clinician about skin conditions, pregnancy or breastfeeding, medicines, and whether sweating happens at night or across the whole body.