Diphenhydramine-PE Tannates

Drug Information

Summary of Interactions with Vitamins, Herbs, & Foods

What Are Nutrient Interactions

Types of interactions: Beneficial Adverse Check

Replenish Depleted Nutrients

none

Reduce Side Effects

none

Support Medicine

none

Reduces Effectiveness

none

Potential Negative Interaction

Henbane

Antihistamines, including diphenhydramine, can cause "anticholinergic" side effects such as dryness of mouth and heart palpitations. Henbane (Hyoscyamus niger) also has anticholinergic activity and side effects. Therefore, use with diphenhydramine could increase the risk of anticholinergic side effects, though apparently no interactions have yet been reported with diphenhydramine and henbane. Henbane should not be taken except by prescription from a physician trained in its use, as it is extremely toxic.

The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.

Explanation Required

Fo-Ti

Many drugs used in the treatment of high blood pressure cause relaxation or dilation of blood vessels. Laboratory studies show that emodin, a compound in Polygonum multiflorum, also relaxes blood vessels. However, animal studies reveal that phenylephrine blocks the action of emodin. Controlled studies are needed to determine whether Polygonum multiflorum helps people with high blood pressure and whether phenylephrine blocks its beneficial effects.

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.

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Last Review: 03-24-2015

Please read the disclaimer about the limitations of the information provided here. Do NOT rely solely on the information in this article. The Healthnotes knowledgebase does not contain every possible interaction.

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The information presented by Healthnotes 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. 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 December 2019.

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