Qbrexza and Contact Lenses: What the Eye-Exposure Study Found

The prescription treats your underarms, but the next thing your hands touch might be a contact lens. Tell your prescriber that you wear lenses when discussing Qbrexza, the 2.4% glycopyrronium cloth for excessive underarm sweating. Its US label warns that medicine transferred to the eyes can cause enlarged pupils and blurred vision.¹

What did the researchers find?

A 2022 multicenter chart review examined 16 patients diagnosed with medicine-induced pupil enlargement after topical glycopyrronium exposure. Fourteen were female, and eight were 18 or younger. Fourteen had enlargement in one eye rather than both.²

Six patients wore soft contact lenses. Handwashing information was available for 12 patients; all 12 reported not washing their hands after application. The authors considered local eye exposure the likely explanation and described contact-lens wear and poor hand hygiene as associated factors.²

This was a retrospective case series of affected patients. It did not enroll a comparison group of unaffected Qbrexza users or count all exposed lens wearers. Six out of 16 is a description of these cases, not a 37.5% risk for everyone who wears contacts. The findings do not establish that contact lenses must be abandoned during treatment.²

Mention the cloth as a medicine

Fourteen patients did not initially volunteer topical glycopyrronium when asked about medications. Clinicians had to ask further questions to uncover it.²

If you seek care for an eye symptom, name the cloth, its strength, when you last used it, whether you washed afterward and when you handled your lenses. Bring the carton or a photograph of the label. “An underarm wipe” is less useful than the prescription name.

What if vision changes or one pupil looks larger?

The US patient label says to stop using Qbrexza and call your healthcare provider if blurred vision develops. Do not drive, operate machinery or do hazardous work until vision is clear.¹

Do not diagnose a new pupil difference from this article. MedlinePlus³ advises contacting a clinician for sudden, persistent or unexplained pupil changes. It calls for immediate medical attention when unequal pupils accompany blurred or double vision, a drooping eyelid, headache, eye pain, vision loss or its other listed symptoms. Unequal pupils after an eye or head injury also need immediate help.³

The play

Try this: review the lens routine before starting

Name the prescription. Tell both the prescriber and your eye-care professional that you use Qbrexza and wear soft contact lenses.

Walk through the handwashing step. Ask the pharmacist to review application, disposal and immediate washing with soap and water. Ask how to fit those steps around inserting or removing lenses.¹

Keep the response instructions nearby. Write down whom to call for blurred vision and the label’s stop-use instruction. A note does not replace urgent assessment for a new pupil difference with warning symptoms.¹³

Bring the questions to the visit

Arms Up introduces the Fresh Log in Chapter 4 to record where sweating happens and how it affects your day. Use those notes to explain what you want treatment to improve, and add your lens-handling questions to the visit. The book does not provide a contact-lens protocol for this prescription.

For the medicine’s wider precautions, read our four safety checks for glycopyrronium cloths.