As jl said, Ginkgo could be a good idea. Also, a drug commonly prescribed for alzheimer's, donepezil (aka Aricept), can be helpful for MS patients. Some abstracts from Pubmed:
J Clin Psychopharmacol. 2000 Jun;20(3):350-6.
A 12-week, open trial of donepezil hydrochloride in patients with multiple sclerosis and associated cognitive impairments.
Greene YM, Tariot PN, Wishart H, Cox C, Holt CJ, Schwid S, Noviasky J.
Department of Psychiatry, University of Rochester Medical Center, New York, USA. firstname.lastname@example.org
Cognitive dysfunction occurs in up to 65% of patients with multiple sclerosis (MS), but there is no effective treatment for the symptoms. The authors conducted a 12-week, open-pilot study to assess the efficacy and tolerability of donepezil HCl administered in patients with MS and cognitive impairment. Seventeen patients at a long-term care facility with Mini-Mental State Examination scores of < or = 25 received 5 mg of donepezil HCl for a 4-week period, followed by 8 weeks of 10 mg of donepezil HCl. Cognitive, neurologic, functional, and behavioral assessments were conducted at baseline and at 4 and 12 weeks. Statistically significant improvement was observed in several cognitive domains including attention, memory, and executive functioning, as well as different aspects of behavior. These data suggest that donepezil HCl merits further study as a potentially viable treatment option for patients with cognitive impairment associated with MS.
Neurology. 2004 Nov 9;63(9):1579-85.
Donepezil improved memory in multiple sclerosis in a randomized clinical trial.
Krupp LB, Christodoulou C, Melville P, Scherl WF, MacAllister WS, Elkins LE.
Department of Neurology, State University of New York at Stony Brook, HSC T12-020, Stony Brook, NY 11794-8121, USA. email@example.com
OBJECTIVE: To determine the effect of donepezil in treating memory and cognitive dysfunction in multiple sclerosis (MS).
METHODS: This single-center double-blind placebo-controlled clinical trial evaluated 69 MS patients with cognitive impairment who were randomly assigned to receive a 24-week treatment course of either donepezil (10 mg daily) or placebo. Patients underwent neuropsychological assessment at baseline and after 24 weeks of treatment. The primary outcome was change in verbal learning and memory on the Selective Reminding Test (SRT). Secondary outcomes included other tests of cognitive function, patient-reported change in memory, and clinician-reported impression of cognitive change.
RESULTS: Donepezil-treated patients showed significant improvement in memory performance on the SRT compared to placebo (p = 0.043). The benefit of donepezil remained significant after controlling for various covariates including age, Expanded Disability Status Scale, baseline SRT score, reading ability, MS subtype, and sex. Donepezil-treated patients did not show significant improvements on other cognitive tests, but were more than twice as likely to report memory improvement than those in the placebo group (p = 0.006). The clinician also reported cognitive improvement in almost twice as many donepezil vs placebo patients (p = 0.036). No serious adverse events related to study medication occurred, although more donepezil (34.3%) than placebo (8.8%) subjects reported unusual/abnormal dreams (p = 0.010).
CONCLUSIONS: Donepezil improved memory in MS patients with initial cognitive impairment in a single center clinical trial. A larger multicenter investigation of donepezil in MS is warranted in order to more definitively assess the efficacy of this intervention.
Mult Scler. 2007 Apr;13(3):376-85. Epub 2007 Jan 29.
Ginkgo biloba for the improvement of cognitive performance in multiple sclerosis: a randomized, placebo-controlled trial.
Lovera J, Bagert B, Smoot K, Morris CD, Frank R, Bogardus K, Wild K, Oken B, Whitham R, Bourdette D.
Department of Veterans Affairs Medical Center, Portland, OR, USA. firstname.lastname@example.org
OBJECTIVES: To determine if Ginkgo biloba (GB) improves the cognitive performance of subjects with multiple sclerosis (MS).
METHODS: Randomized, double-blind, placebo-controlled trial of GB, 120 mg twice a day or placebo for 12 weeks. The primary outcomes were: the long delay free recall from the California Verbal Learning Test-II; the Paced Auditory Serial Addition Test; the Controlled Oral Word Association Test; the Symbol Digit Modalities Test; Useful Field of View Test; and the color-word interference condition from the Stroop Color and Word Test.
RESULTS: On completion, the GB group (n=20) was 4.5 seconds (95% confidence interval (CI) (7.6, 0.9), P=0.015) faster than the placebo group (n=18 ) on the color-word interference condition of the Stroop test. Subjects who were more impaired at baseline experienced more improvement with GB (treatment*baseline interaction, F=8.10, P=0.008). We found no differences on the other neuropsychological tests. Subjects on GB reported fewer cognitive difficulties in the Retrospective Memory Scale of the Perceived Deficits Questionnaire than subjects on placebo (1.5 points, 95% CI (2.6, 0.3), P=0.016). No serious drug related side-effects occurred and GB did not alter platelet function assays.
CONCLUSION: Overall, GB did not show a statistically significant improvement in cognitive function. A treatment effect trend, limited to the Stroop test, suggests that GB may have an effect on cognitive domains assessed by this test, such as susceptibility to interference and mental flexibility.
Explore (NY). 2006 Jan;2(1):19-24.
The effect of Ginkgo biloba on functional measures in multiple sclerosis: a pilot randomized controlled trial.
Johnson SK, Diamond BJ, Rausch S, Kaufman M, Shiflett SC, Graves L.
University of North Carolina-Charlotte, Charlotte, NC.
BACKGROUND: Multiple sclerosis (MS) is a chronic demyelinating neurological disease afflicting young and middle-aged adults, resulting in problems with coordination, strength, cognition, affect, and sensation.
OBJECTIVE: The objective of this study was to determine whether a ginkgo extract (EGb 761) improved functional performance in individuals with MS.
DESIGN: This study used a double-blind, placebo-controlled, parallel group design. The end point was change between baseline (ie, preintervention) and follow-up evaluation following a regimen of four tablets per day at 60 mg per tablet for four weeks.
SETTING: The study was conducted in academic and clinical-based settings.
PATIENTS/PARTICIPANTS: Twenty-two individuals with MS were randomly assigned to either the treatment or control condition. Groups did not differ with respect to age, IQ, and education.
INTERVENTION: Half of the subjects received 240 mg per day of ginkgo special extract (EGb 761), and the other half received placebo.
MAIN OUTCOME MEASURE: The main outcome measures assessed depression (Center for Epidemiologic Studies of Depression Scale [CES-D]), anxiety (State-Trait Anxiety Inventory [STAI]), fatigue (Modified Fatigue Impact Scale [MFIS]); symptom severity (Symptom Inventory [SI]) and functional performance (Functional Assessment of Multiple Sclerosis [FAMS]).
RESULTS: The ginkgo group had significantly more individuals showing improvement on four or more measures with improvements associated with significantly larger effect sizes on measures of fatigue, symptom severity, and functionality. The ginkgo group also exhibited less fatigue at follow-up compared with the placebo group.
CONCLUSIONS: This exploratory pilot study showed that no adverse events or side effects were reported and that ginkgo exerted modest beneficial effects on select functional measures (eg, fatigue) among some individuals with MS.