If you are in the UK and you want the strongest antiperspirant you can buy, the answer is a 20% aluminium chloride hexahydrate pharmacy medicine: Driclor, Anhydrol Forte or the Odaban spray. NICE CKS lists that strength as first-line for primary localised hyperhidrosis. You do not need a prescription. US brands that publish 15% aluminium chloride are weaker on the label and are imports, not the ceiling.
This page ranks blocking power for moderate to severe sweating. For a wider buying guide, start with best antiperspirants.
Disclosure: This site earns affiliate commissions from qualifying purchases. This does not affect our editorial independence or product rankings.
Health note: This article is educational and not medical advice. Strong aluminium chloride products can irritate skin. If excessive sweating is affecting your life, or over-the-counter products are not enough, see a GP or dermatologist for diagnosis and prescription options. Read our full disclaimer.
The Potency Tiers Explained
Antiperspirant strength is driven mainly by the concentration and type of aluminium salt:
| Tier | Active ingredient | Where you get it | Typical sweat reduction |
|---|---|---|---|
| Regular | Aluminium zirconium / sesquichlorohydrate | Supermarkets | For ordinary sweating, not hyperhidrosis |
| US clinical imports | Published 15% aluminium chloride, or an unpublished concentration | Certain Dri, SweatBlock, ZeroSweat; Duradry does not publish a strength | Below the UK pharmacy tier on the label |
| UK pharmacy strength | 20% aluminium chloride hexahydrate | Driclor, Anhydrol Forte, Odaban | The strongest OTC option in the UK |
| After antiperspirants | Oral antimuscarinics, then options such as iontophoresis, botulinum toxin or Axhidrox | GP, then local NHS commissioning | Not something to buy off a shelf |
The ranking below follows that order. A 15% US product is not "maximum strength" for a UK reader.
The strongest antiperspirants you can buy in the UK
1. Driclor — the usual pharmacy benchmark
Active ingredient: 20% aluminium chloride hexahydrate | Format: Roll-on | Legal status: Pharmacy (P) medicine
Driclor is the name most UK pharmacists still reach for. Apply at night to completely dry skin and wash off in the morning. The June 2026 discontinuation notice covers the 60ml pack; 20ml and 75ml packs were still listed for dispensing at that time. Check the pack you are actually offered.
Read the Driclor review → | Check Amazon UK →
2. Anhydrol Forte — same 20%, often the cheaper bottle
Active ingredient: 20% aluminium chloride hexahydrate | Format: 60ml roll-on | Legal status: Pharmacy (P) medicine
Anhydrol Forte is the same active at the same strength, made by Dermal Laboratories. Since June 2026 it is the NHS reference product when a prescription is written generically for aluminium chloride 20% solution, 60ml. We have not verified an Amazon UK ASIN. The buy link goes to a Chemist.net product page and is not an Associates link.
Read the Anhydrol Forte review → | Check a UK pharmacy →
3. Odaban — the 20% spray
Active ingredient: 20% aluminium chloride hexahydrate | Format: 30ml pump spray | Legal status: Pharmacy medicine in the UK
Odaban is the spray in this group. It is easier to cover soles and larger areas than a roll-on. The silicone base is meant to buffer irritation; it can still sting on damp skin. Follow the leaflet.
Read the Odaban review → | Check Amazon UK →
4. Perspirex — gentler, strength not published
Perspirex Original lists aluminium chloride and calcium lactate. Riemann does not publish the concentration, so it does not outrank a labelled 20% medicine on strength. It is the roll-on to try when a 20% product irritates skin you cannot keep using.
Read the Perspirex review → | Check Amazon UK →
US imports: not first-line, and not stronger on the label
ZeroSweat and SweatBlock — published 15%
ZeroSweat and SweatBlock wipes publish 15% aluminium chloride. That is a real clinical strength in the US, and it is below Driclor, Anhydrol Forte and Odaban. Treat them as imports if a UK pharmacy medicine is out of stock or you already know you tolerate this tier. Plan on reapplying SweatBlock every few days rather than treating a 7-day claim as guaranteed.
Duradry — concentration not published
Duradry PM is an overnight gel. The brand does not publish an aluminium chloride percentage, so this page does not rank it above a labelled 20% medicine. The 3-step system adds a daytime gel and a wash; more steps are not evidence of a higher dose.
How to Get Maximum Strength Without Wrecking Your Skin
The most common mistake with strong antiperspirants is using them in a way that maximises irritation rather than results:
- Apply at night, to completely dry skin. This applies to 15% imports and to 20% pharmacy medicines. Towel off, then wait before you dress.
- Start every other night. Build to nightly use over 1-2 weeks so your skin adapts.
- Never apply after shaving. Wait at least 24-48 hours.
- Wash it off in the morning and use a regular deodorant during the day for odour.
- Manage irritation, do not push through it. A thin layer of 1% hydrocortisone the morning after helps; persistent redness or peeling means take a break.
When a 20% product is not enough
If you have used Driclor, Anhydrol Forte or Odaban correctly for a few weeks and you are still soaking through, the next conversation is with a GP, not another imported 15% brand. Depending on the area and what your local NHS commissions, that can mean:
- An oral antimuscarinic such as propantheline (licensed) or oxybutynin (often used off-label). See prescription medications.
- Iontophoresis for hands and feet.
- Botulinum toxin for severe underarms, where your integrated care board funds it.
- Axhidrox (glycopyrronium bromide cream), which NICE TA1175 recommends for severe primary underarm sweating in adults only after lifestyle measures, aluminium antiperspirants and oral antimuscarinics have failed or are unsuitable.
Qbrexza wipes are a US product and are not the UK option. Do not import a prescription medicine to get around that.
The bottom line
For a UK buyer, the strongest antiperspirants on the shelf are Driclor, Anhydrol Forte and Odaban. Perspirex is the gentler roll-on when those sting. ZeroSweat, SweatBlock and Duradry are US imports and sit below a labelled 20% medicine.
Sources
- NICE Clinical Knowledge Summary — Hyperhidrosis
- NHS — Excessive sweating (hyperhidrosis)
- Anhydrol Forte Summary of Product Characteristics (emc)
- NICE technology appraisal TA1175 — glycopyrronium bromide cream
