Fever Bark

Are there any interactions with medications?



Medications used during surgery (Anesthesia)
Interaction Rating: Major Do not take this combination.

Fever bark contains a chemical called reserpine. Taking reserpine along with medications used for surgery can cause heart problems. Be sure to tell your doctor what natural products you are taking before having surgery. You should stop taking fever bark at least two weeks before surgery.



Naloxone (Narcan)
Interaction Rating: Major Do not take this combination.

Fever bark contains a chemical that can affect the brain. This chemical is called yohimbine. Naloxone also affects the brain. Taking naloxone with yohimbine might increase the chance of side effects such as anxiety, nervousness, trembling, and hot flashes.



Phenothiazines
Interaction Rating: Moderate Be cautious with this combination.
Talk with your health provider.

Fever bark contains a chemical called yohimbine. Some phenothiazines have effects similar to yohimbine. Taking fever bark and phenothiazines together might increase the effects and side effects of yohimbine.

Some phenothiazines include chlorpromazine (Thorazine), fluphenazine (Prolixin), trifluoperazine (Stelazine), thioridazine (Mellaril), and others.



Stimulant drugs
Interaction Rating: Moderate Be cautious with this combination.
Talk with your health provider.

Stimulant drugs speed up the nervous system. By speeding up the nervous system, stimulant medications can make you feel jittery and speed up your heartbeat. Fever bark might also speed up the nervous system. Taking fever bark along with stimulant drugs might cause serious problems including increased heart rate and high blood pressure. Avoid taking stimulant drugs along with fever bark.

Some stimulant drugs include diethylpropion (Tenuate), epinephrine, phentermine (Ionamin), pseudoephedrine (Sudafed), and many others.

Dosing considerations for Fever Bark.

The appropriate dose of fever bark depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for fever bark. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.