Inclusion criteria:
- 18 to 85 years old, male and female
- mRS<=2 prior to stroke
- Ischemic or hemorrhagic stroke as diagnosed by vascular neurologist or as proven on magnetic resonance imaging (MRI) or non-contrast head computed tomography (NCHCT)
- 24 hours to 3 weeks after stroke onset or time last known well prior to detection of symptoms
- NIHSS>=3 and NIHSS<=15
- Creatinine Clearance of greater than or equal to 60 mL/min using the Cockroft-Gault equation.
- Have passed a swallow evaluation prior to drug administration
- The patient is an acute rehabilitation candidate or candidate for the Homeward Stroke Program
- Able to participate in administered tests
Exclusion criteria:
- Any degree of receptive aphasia
- Moderate or severe expressive aphasia
- Currently pregnant or plans to get pregnant
- Currently breastfeeding
- Any patient admitted with primary SAH on either non-contrast head CT or MRI brain
- Diagnosis of dementia or mild cognitive impairment prior to index stroke
- Prior limb amputation
- Currently prescribed or taking a primary anticholinergic medication
- Currently enrolled in any other investigational pharmacologic or procedural clinical trial
- Malignancy with active treatment
- History of prior stroke with residual impairment
- Current or prior neuroleptic use
- History of suicidality or psychosis (The Columbia Suicide Severity Ratings Scale (C-SSRS) will be administered at the screening visit to assess depression and suicidal thoughts for subject eligibility. Any subjects who indicate severe depression or suicidal thoughts and/or attempts within the last year will not be eligible)
- Prior history of seizures
- Prior treatment with amantadine
- Parkinson’s disease
- Amantadine allergy
- Elevated liver function tests (aspartate aminotransferase and alanine aminotransferase above the upper limit of normal)
List of prohibited cholinergic medications:
- atropine (Atropen)
- belladonna alkaloids
- benztropine mesylate (Cogentin)
- clidinium
- cyclopentolate (Cyclogyl)
- darifenacin (Enablex)
- dicylomine
- fesoterodine (Toviaz)
- flavoxate (Urispas)
- glycopyrrolate
- homatropine hydrobromide
- hyoscyamine (Levsinex)
- ipratropium (Atrovent)
- orphenadrine
- oxybutynin (Ditropan XL)
- propantheline (Pro-banthine)
- scopolamine
- methscopolamine
- solifenacin (VESIcare)
- tiotropium (Spiriva)
- tolterodine (Detrol)
- trihexyphenidyl
- trospium
Note: Women and members of minority groups will be included in accordance with the NIH Policy on Inclusion of Women and Minorities as Participants in Research Involving Human Subjects.
