Drug Information
Summary of Interactions with Vitamins, Herbs, & Foods
Types of interactions:
Beneficial
Adverse
Check
Replenish Depleted Nutrients
Support Medicine
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Vinpocetine
In a preliminary trial, an extract of periwinkle called vinpocetine was shown to produce minor improvements in short-term memory among people taking flunitrazepam, a benzodiazepine. Further study is needed to determine if vinpocetine would be a helpful adjunct to use of benzodiazepines.
The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
Potential Negative Interaction
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Kava
Kava (Piper methysticum) is an herb used to treat anxiety disorder. One individual who took a benzodiazepine (alprazolam) and kava together, along with two other medications (cimetidine and terazosin) was hospitalized in a lethargic and disoriented condition. Further research is needed to determine whether the combination of kava and benzodiazepines produces an adverse interaction. However, individuals should not take benzodiazepines and kava together unless supervised by a doctor.
The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
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St. John’s Wort
In a study of healthy volunteers, administration of St. John's wort (Hypericum perforatum) along with alprazolam decreased blood levels of alprazolam, compared with the levels when alprazolam was taken by itself.3 Individuals taking alprazolam should not take St. John's wort without supervision by a doctor.
The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers’ package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist.
