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| Reason | # Patients | Percentage of patients | |
|---|---|---|---|
| Ginkgo Biloba Extract | 3 | 2% | |
| Dextroamphetamine and Amphetamine | 2 | 1% | |
| Vitamin E | 2 | 1% | |
| Grape Seed Extract | 1 | 1% | |
| Pycnogenol | 1 | 1% | |
| Vitamin B Complex | 1 | 1% | |
| Vitamin C with Rose Hips | 1 | 1% |