Oxybutynin For Excessive Sweating

Oxybutynin can be taken at different times of day, depending on the prescribed formulation and your treatment plan. For excessive sweating, taking oxybutynin at night may suit some people, particularly if side effects such as dry mouth or dizziness affect their daytime activities.

However, there is no universally best time to take it. If you have been prescribed oxybutynin once daily, follow your prescriber’s instructions and take it consistently at the recommended time.

The maximum daily dose of oxybutynin depends on the formulation, the condition being treated and individual circumstances. For excessive sweating (hyperhidrosis), treatment often starts with 2.5mg once daily, with adjustments made gradually by a prescriber if necessary.

If your 2.5mg or 5mg once-daily dose is not effective, consult your prescriber before making any changes.

Oxybutynin can cause side effects because it reduces the activity of certain nerve signals involved in sweating and other bodily functions. The common side effects include dry mouth, constipation, blurred vision, dizziness, drowsiness and dry eyes.

It can also make it harder to pass urine and reduce your ability to sweat normally, increasing the risk of overheating in hot weather or during exercise

When taking oxybutynin for excessive sweating, tell your doctor or pharmacist about all medicines, supplements and herbal remedies you use. Certain antidepressants, antihistamines, other anticholinergic medicines and sedatives can increase side effects such as dry mouth, constipation, blurred vision and drowsiness. Alcohol may also worsen dizziness or sleepiness, particularly when starting treatment.

Do not stop any prescribed medicine without advice, and check with a healthcare professional before combining oxybutynin with other treatments.

Oxybutynin 2.5mg and 5mg standard-release tablets are absorbed and processed relatively quickly by the body. The elimination half-life is approximately 2–3 hours during the main elimination phase, although this can vary between individuals. Oxybutynin is also converted into an active metabolite, which may contribute to its effects.

The medicine’s effects may last longer than the time it takes for its blood levels to fall, and elimination can be slower in older adults.