De capsules bij voorkeur verspreid over de dag innemen bij een maaltijd. Bij chronische klachten Ginkgo extract ten minste 6 tot 8 weken innemen.
Subchronische en chronische toxiciteitsstudies laten zien dat ginkgo-extract zeer veilig is (de LD50, de lethale dosis voor 50% van de proefdieren was meer dan 9600 mg/kg). In 98% van de (humane) klinische studies is ginkgo-extract goed tot zeer goed verdragen. Eventuele bijwerkingen zijn mild, voorbijgaand en reversibel; in enkele gevallen treden maagdarmklachten, duizeligheid of hoofdpijn op. Er zijn geen aanwijzingen dat ginkgo-extract op zichzelf spontane bloedingen veroorzaakt.
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