Qbrexza
A medicated cloth wiped across the underarms once a day for heavy sweating. It blocks the nerve signal that switches sweat glands on, and because it is an anticholinergic it can cause dry mouth and blurred vision if it reaches places it should not.
Key facts
Qbrexza at a glance.
Used for
Excessive underarm sweating
Results
1–4 weeks
Treatment commitment
One cloth daily, ongoing
Key precautions
Avoid eye transfer; heat illness risk
What is it?
Top things to know about Qbrexza
- It is an anticholinergic. Glycopyrronium blocks acetylcholine receptors on sweat glands.
- It reduces underarm sweating. It is used for primary axillary hyperhidrosis.
- It is not an ordinary wipe. Medicine on the hands can reach the eyes and cause visual symptoms.
- Some conditions rule it out. The label excludes glaucoma, myasthenia gravis and certain bowel or heart disorders.
Often used for
What Qbrexza is used for
HOW IT WORKS
How Qbrexza works
Diagram explanation and sources
Blocks sweat signals: Stops acetylcholine from activating sweat-gland receptors. Reduces sweat production: The gland releases less sweat into its duct. Keeps underarms drier: Less sweat reaches the skin surface.
Topical glycopyrronium acts at peripheral muscarinic acetylcholine receptors. It does not plug sweat ducts or destroy glands. Neural and receptor symbols are schematic.
Strengths
Glycopyrronium strengths
Topical glycopyrronium is supplied as a 2.4% medicated cloth for primary underarm hyperhidrosis in patients aged 9 and older. It is a topical, site-specific product, not the equivalent of an oral glycopyrrolate dose.
2.4%
The label uses one cloth for both underarms once daily. Avoid transfer to the eyes, wash hands after use and follow warnings about overheating and anticholinergic effects.
Strength sources
Forms
Glycopyrronium forms
Cloth
A cloth carries liquid onto the skin without pouring. Friction and the liquid base influence how comfortable it feels.
How to use it
Your treatment, step by step.
How to apply it
- 01
When to Apply
Once a day at bedtime, on clean dry underarm skin. Wipe one cloth across one whole underarm, then the same cloth across the other, then throw it away. Let the skin dry and wash your hands with soap and water straight away. Do not shower straight after.
- 02
How to Start
Once daily from day one, with no build-up period. If you shave, do it a day or two before rather than the same night — it stings sharply on freshly shaved skin. Give it four weeks before deciding.
- 03
If It Irritates
Redness, burning and itching are the commonest problems and often settle over the first few weeks. A plain moisturizer the next morning helps. If the skin becomes sore or raw, take a few days off and ask — breaks are allowed.
- 04
If It’s Not Working
One strength, nothing to increase, and two cloths is not the answer. Four weeks is a fair test. After that the options are a prescription-strength antiperspirant, iontophoresis, botulinum toxin injections, tablets, or a procedure that reduces the glands.
Monitoring & follow-up
No blood tests or laboratory monitoring for routine use.
Monitoring is a conversation at about four weeks — is the sweating better, and are the anticholinergic effects tolerable. Dry mouth is commonest, then blurred vision, then constipation and trouble passing urine.
Some people need more care — anyone with glaucoma, particularly the narrow-angle form, because anticholinergics can raise pressure inside the eye; anyone with an enlarged prostate or bladder outflow problems, myasthenia gravis, severe ulcerative colitis or a bowel obstruction; and older people already on several medicines with anticholinergic effects, where total exposure matters, not any one drug.
Sweating is how the body cools; take care in hot weather and hard exercise.
What to expect
How things change over time.
Using it
One cloth across both underarms at bedtime, then wash your hands. Stinging and redness are common at the start.
Starting
Most people notice less sweating within the first week.
Settling
The local irritation often eases. Dry mouth, if it happens, appears early.
Judge it here
Where the trials measured their main result. The clearest change was how much the sweating interfered with everyday life — more than measured sweat volume.
While you use it
The effect lasts only while you use it; sweating returns within days of stopping.
- First wipe
- Week 1
- Weeks 1 to 4
- Week 4
- Ongoing
When you stop
There is no taper and no rebound. Sweating returns to its previous level within a few days — the nerve signal was blocked, not the gland removed.
Dry mouth, blurred vision or constipation settles once you stop, usually within days.
People stop for two reasons: underarm irritation and dry mouth. Neither is dangerous, and both are worth raising at a review before concluding the drug failed.
What it Pairs with
Qbrexza + your routine
| Product or situation | With Qbrexza | What to know |
|---|---|---|
| Moisturizer | Can pair | A plain moisturizer the next morning helps. |
| Touching your eyes before washing your hands | Avoid | The commonest avoidable problem. On a fingertip it can dilate a pupil and blur near vision for hours or a couple of days. |
| Handling contact lenses before washing your hands | Avoid | Same reason, same result. |
| Applying it to broken, raw or freshly shaved skin | Avoid | Stings sharply; more is absorbed. |
| Using more than one cloth a day, or keeping a used one | Avoid | One cloth is the dose; a used one is not clean or reliable. |
| Applying it anywhere other than the underarms | Avoid | Not made for palms, soles, face or groin. |
| Showering or swimming straight after applying | Avoid | Let it dry first. |
| Applying it for someone else and not washing your hands | Avoid | Same rule for a parent applying it to a child. |
| If you are pregnant or breastfeeding | Use care | Not studied in pregnancy. Ask the doctor managing your pregnancy before starting or continuing. |
| If you have glaucoma | Use care | Narrow-angle especially. Anticholinergics can raise pressure inside the eye. |
| If you have an enlarged prostate | Use care | Trouble passing urine counts too. Anticholinergics worsen it and can rarely cause retention. |
| If you have myasthenia gravis | Use care | Severe ulcerative colitis or a bowel problem counts too. Anticholinergics affect all of these. |
| If you take other anticholinergics | Use care | Some antihistamines, bladder medicines, older antidepressants and Parkinson's medicines add to the same effect. The total matters. |
| If your vision blurs | Use care | Or one pupil looks larger than the other. Usually transfer from the hands, and it settles, but get it checked. |
| If you work in heat or exercise hard | Use care | Sweating is how the body cools, and anticholinergics reduce that ability. |
| If the underarm skin becomes raw | Use care | Or does not settle. Irritation is the commonest reason for stopping, and it can be managed before giving up. |
Getting it and cost
Getting Qbrexza.
Cost & access
Brand only in the United States, no generic cloth, and expensive. Coverage is inconsistent and prior authorization is common — plans often ask that a prescription-strength antiperspirant was tried first.
What affects the cost
It comes as a box of single-use cloths used daily, so the cost recurs monthly rather than once. Manufacturer savings programs exist and change often.
What affects the cost
Glycopyrrolate tablets are inexpensive by comparison, which is one reason they are still used off-label for sweating despite the wider side effects.
Alternatives
Other options to consider.
Botulinum toxin injections
And the most reliable option for underarm sweating, given as a set of small injections every four to six months in a clinic. Expensive, though coverage for underarm hyperhidrosis is often better than for the cloth.
Glycopyrrolate or oxybutynin tablets
Useful when several areas sweat, with reasonable if less formal evidence. The same anticholinergic effects as the cloth, felt more strongly because the whole body is exposed.
Iontophoresis
Good evidence for palms and soles and much less practical for underarms. No drug involved, but it needs a device and repeated sessions at home.
Microwave treatment such as miraDry
Reduces underarm sweat glands lastingly in one or two sessions, with good evidence. It is a procedure, with swelling and soreness afterwards, it is expensive, and it is not reversible.
Questions
Questions you might be asking.
Why do I have to wash my hands after using it?
Because the drug works wherever it lands. Rubbing an eye with it on your fingers can dilate that pupil and blur near vision for hours or a couple of days. Wash with soap and water straight after.
Does it stop me sweating everywhere?
No. It works where you apply it, approved for the underarms only. Some is absorbed — hence dry mouth — but it is not a body-wide blocker.
How long does it take to work?
Most people notice less wetness in the first week. Four weeks is the fair point to judge, where the trials measured.
Can I use my antiperspirant as well?
Yes — different mechanisms, often used together, antiperspirant in the morning and the cloth at night.
What happens if I stop?
Sweating returns to its usual level within a few days. No rebound, nothing to taper.
Can I use it on my hands or face?
Not approved or studied for those areas, and on the hands it gets into your eyes far more easily.
Related
Keep exploring.
Hyperhidrosis
Hidradenitis Suppurativa
Botox
Hyperhidrosis vs Body Odor
Hyperhidrosis vs Night Sweats
Acne
Acne vs Hidradenitis Suppurativa
Acne vs Rosacea
Hidradenitis Suppurativa vs Abscess
Hidradenitis Suppurativa vs Boils
Hidradenitis Suppurativa vs Epidermal Inclusion Cyst
