Oxybutynin
Brand: Oxytrol
Key warning
Anticholinergic burden: use is limited in older adults, where it adds to confusion and fall risk
Common side effects
- Dry mouth
- Constipation
- Blurred vision
- Drowsiness
- Trouble emptying the bladder
Key interactions & cautions
- Adds to the effect of other anticholinergics (diphenhydramine, tricyclics)
- Alcohol and sedatives increase drowsiness
- May slow absorption of other oral drugs by slowing the gut
Counseling points
- Take the extended-release tablet whole - do not crush or chew
- Dry mouth is expected; sip water or use sugar-free gum
- Report inability to urinate, or eye pain and halos around lights
- Heat stroke is a risk in hot weather because you sweat less
High-yield study aid for exam prep — not a substitute for the package insert or a pharmacist’s dispensing reference.