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Anticholinergics - Parkinson's drugs

Anticholinergics are a type of drug, less commonly prescribed now, used to treat the symptoms of Parkinson's

The generic drug names and brand names are:

  • Trihexyphenidyl (Broflex®, Artane®, Agitane®)
  • Benztropine (Cogentin®)
  • Orphenadrine (Disipal®)
  • Procyclidine (Kemadrin®, Arpicolin®)

Anticholinergics can be useful for younger people in the early stages of Parkinson's when symptoms are mild. They tend to improve tremor more than slowness and stiffness.

They can be prescribed alone in the early stages, before levodopa is necessary, although they can be used in conjunction with levodopa or amantadine too.

Anticholinergics can be used to reduce saliva production when drooling is a problem.

They can also damp down bladder contractions that can cause a strong, frequent urge to urinate.

Side effects and problems of anticholinergics

Some people may experience confusion, a dry mouth, constipation and blurred vision when taking anticholinergics.

Anticholinergics may interfere with levodopa absorption in the small bowel, which reduces the effectiveness of Madopar or Sinemet

Anticholinergics are not usually prescribed to older people with Parkinson's because there is an increased risk of memory loss and, in men, urinary hesitancy.

More information

Read our drug treatment of Parkinson's booklet

Or visit the Medicine Guides website for independent, up to date information about these medicines:

More drug treatments of Parkinson's

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