Vinpocetine has been reported to occasionally cause an upset stomach, flushing of the skin, and a skin rash;39 these effects are mild and rarely cause anyone to stop taking it. The whole periwinkle herb may also cause minor stomach upset. This may be remedied by taking the herb with food. Neither vinpocetine nor periwinkle should be taken during pregnancy or breast-feeding until more information is available. The Commission E of the German government states that some animal studies suggest periwinkle could suppress the immune system.40 This problem has not been observed to date in studies involving vinpocetine.
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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2014.