Excessive sweating affects an estimated 1–3% of the UK population at clinically troublesome levels. It is a common reason for community pharmacy consultations and one of the most under-diagnosed dermatological conditions. The condition is rarely dangerous, but it has a measurable impact on social, occupational and educational life that justifies serious treatment effort.
This guide summarises the over-the-counter treatments community pharmacists can recommend, the secondary causes worth excluding, and the referral pathway for patients who have exhausted topical options. It draws on the NICE Clinical Knowledge Summary on hyperhidrosis, the British Association of Dermatologists guideline, and the BNF.
Primary versus secondary hyperhidrosis
The first decision is whether the sweating is primary (idiopathic, focal, often bilateral, present from adolescence) or secondary (generalised, of recent onset, with other features).
Primary hyperhidrosis features:
- Bilateral and roughly symmetrical
- Focal — axillae, palms, soles, face are most common
- Present at least 6 months
- Typically begins before age 25
- Family history common
- Stops during sleep
- At least one episode per week severe enough to interfere with daily life
Suggestive of secondary hyperhidrosis:
- New onset in middle age or later
- Generalised sweating, not focal
- Night sweats
- Associated weight loss, fevers, palpitations or other systemic features
- Sweating only at one anatomical site (asymmetric — Frey syndrome, neurological)
Common secondary causes to consider include:
- Hyperthyroidism
- Diabetes mellitus and hypoglycaemia
- Menopause (hot flushes)
- Lymphoma and other malignancy (B symptoms)
- Tuberculosis and other chronic infection
- Phaeochromocytoma (rare)
- Anxiety disorders (situational)
- Medications: SSRIs, opioids, hormonal therapies, some diabetes drugs, alcohol withdrawal
The pharmacist's role is to recognise these patterns and refer for a GP review where any feature of secondary hyperhidrosis is present.
Topical aluminium chloride — first-line OTC
Aluminium chloride hexahydrate is the active ingredient in over-the-counter antiperspirants and the more concentrated specialist products available without prescription.
| Product | Strength | Notes |
|---|---|---|
| Standard antiperspirant | Aluminium salts 12–25% (varied) | Daily use; mild hyperhidrosis |
| Anhydrol Forte | Aluminium chloride hexahydrate 20% | Pharmacy supply |
| Driclor | Aluminium chloride hexahydrate 20% | Pharmacy supply |
| ZeroSweat | Aluminium chloride 12% | Pharmacy supply |
| Perspirex | Aluminium chloride 25% (lower volume) | Pharmacy supply |
Mechanism: aluminium chloride forms plugs of aluminium hydroxide and protein within sweat ducts, mechanically blocking secretion. The plugs persist for 24–48 hours.
Application advice:
- Apply to dry skin at night (sweating is lowest during sleep, allowing the plugs to form)
- Wash off in the morning
- Use nightly until effect achieved (usually 5–7 nights), then reduce to maintenance frequency (1–2 times per week)
- Skin irritation is common; rotate strength or use less frequently
- Do not apply to recently shaved or broken skin
- Cover with a thin layer of hydrocortisone 1% if irritation troublesome
- Plantar (foot) and palmar (hand) hyperhidrosis benefit from occlusion (cling film) for the first few applications, but this increases irritation risk
Limitations:
- Skin irritation is the dominant reason for discontinuation
- Less effective for palmar and plantar hyperhidrosis than for axillary
- Limited use in facial hyperhidrosis (irritation risk)
Topical glycopyrronium
Glycopyrronium bromide 1% wipes (Rapifort wipes) are licensed in the UK for severe primary axillary hyperhidrosis in adults and adolescents from age 9. The product is a prescription-only medicine, but pharmacy teams should know it exists for the patient who has failed aluminium chloride.
The wipes are applied once daily to clean, dry axillary skin. Anticholinergic side effects (dry mouth, blurred vision, urinary symptoms) are usually mild but should be discussed.
Iontophoresis
Iontophoresis uses a low-voltage direct current passed through tap water (or, for resistant cases, a solution containing glycopyrronium) to reduce sweat gland activity. It is the first-line treatment for palmar and plantar hyperhidrosis where topical therapy has failed.
NHS access is patchy. Patients can buy home iontophoresis units (£250–£500 in 2026) for daily use; many start with a small number of treatments at a dermatology clinic before transferring to home use.
Oral medication
Oral anticholinergics (oxybutynin, propantheline, glycopyrronium tablets) are sometimes used for generalised hyperhidrosis under specialist supervision. Dose-limiting side effects (dry mouth, constipation, urinary retention, blurred vision, central effects in older patients) are common.
Beta-blockers (propranolol) can help with situational anxiety-driven sweating.
Botulinum toxin
Type A botulinum toxin (Botox, Xeomin, Bocouture) is licensed for severe primary axillary hyperhidrosis. NHS funding varies by ICB; private treatment is widely available. Effect lasts 4–9 months. The intervention is most useful for severe axillary cases that have failed topical and systemic options.
Endoscopic thoracic sympathectomy
Surgical sympathectomy is reserved for the most severe cases. It carries a significant rate of compensatory sweating elsewhere on the body, which can be more troublesome than the original problem. NICE recommends careful counselling and considered patient selection.
Lifestyle and adjunctive measures
Practical advice that often improves quality of life:
- Loose, breathable clothing in natural fibres (cotton, bamboo, merino wool)
- Sweat-wicking athletic fabrics for exercise
- Garment liners for axillary sweating (washable underarm pads)
- Antibacterial soap (chlorhexidine 4% wash) for affected areas to reduce odour
- Foot powder containing aluminium chlorohydrate or talc; daily sock change
- Avoid known triggers: spicy food, caffeine, alcohol, hot drinks
- Stress management techniques where anxiety is a contributor
Children and adolescents
Primary hyperhidrosis often begins in adolescence and can be deeply distressing at school. The pharmacist can recommend strong antiperspirants (Driclor, Perspirex) for adolescents from age 12, applied with care for irritation. Earlier presentation, severe palmar disease or any sign of secondary causes warrants GP referral for paediatric or dermatology assessment.
When to refer
- Suspicion of secondary cause (new onset, generalised, night sweats, systemic features)
- Failure of topical therapy after 6–8 weeks of consistent use
- Palmar or plantar hyperhidrosis interfering with work, school or daily function
- Child or adolescent with severe focal hyperhidrosis
- Patient interested in iontophoresis, glycopyrronium wipes, botulinum toxin or surgery
Counselling structure
A 60-second pharmacy consultation usually identifies the correct pathway:
- Where is the sweating? (axillary / palmar / plantar / facial / generalised)
- When did it start? (lifelong or recent)
- What treatments have already been tried?
- Any associated symptoms? (weight loss, palpitations, night sweats, anxiety)
- How is daily life affected? (work, sleep, social)
PharmSee's pharmacy directory helps patients find a community pharmacy for a face-to-face consultation; the pharmacist career hub covers the wider clinical scope of the community pharmacist in dermatological self-care advice. The PharmSee jobs board lists current pharmacist and pharmacy technician vacancies across the UK.
Sources
- NICE Clinical Knowledge Summary: Hyperhidrosis
- British Association of Dermatologists — Hyperhidrosis guideline (current edition)
- BNF — Antiperspirants and hyperhidrosis treatment
- Hyperhidrosis UK — Patient information
- NHS — Excessive sweating (hyperhidrosis)