Note: Over-the-counter supplements containing ephedra were banned by the U.S. Food and Drug Administration (FDA) in May 2004. See below for additional information.
Ephedra (Ephedra sinica), also called ma huang, is an herb that has been used in Traditional Chinese Medicine (TCM) for more than 5,000 years, primarily to treat asthma or bronchitis. Ephedra is also prescribed for symptoms of cold and flu, including nasal congestion, cough, fever, and chills.
While ephedra is a naturally occurring herb, its main active ingredient ephedrine can also be synthesized as a medication. Synthetic ephedrine compounds, such as pseudoephedrine, are widely used in over-the-counter cold remedies and are regulated as a drug. This is unlike the regulation of ephedrine alkaloids derived from the herb itself. These are regulated as dietary supplements.
Until May 2004, ephedra was sold commercially as an energy booster, weight-loss supplement, and athletic performance enhancer. Although some scientific evidence suggests that this herbal supplement may improve weight, the information overall regarding its effectiveness for weight loss, energy, or athletic performance has been inconclusive and controversial. In addition, ephedra-containing products sold for these purposes have been linked to many cases of stroke, heart arrhythmia (irregular heart rhythm), and even death. Several of these products also contain caffeine; the combination of ephedra with caffeine dramatically increases the chances of adverse side effects.
It is important to note that ephedrine containing products are banned from amateur sporting events, and evidence of ephedra on drug testing will likely disqualify athletes from competition.
The FDA ban on this substance includes any dietary supplements that contain ephedra, ephedrine, norephedrine, ma huang, Sida cordifolia, or pinellia. This does not pertain to teas (which are regulated as a conventional food) or to traditional Chinese herbal remedies prescribed by a traditional Chinese physician.
Ephedra is a shrub that is native to Pakistan, China, and northwestern India. Some ephedra species grow in the Southwest desert. The ephedra plant is a perennial evergreen that stands, on average, 1 foot high but may grow up to 4 feet. Nearly leafless, the plant has slender, cylindrical, yellow-green branches and underground runners. In August, the flowers bear poisonous, fleshy, red cones resembling berries. The three ephedra species -- ephedra sinica, ephedra equisetina, and ephedra intermedia -- are collectively known by their Chinese name ma huang.
Ephedra can come in dried or liquid form. It can be taken as a tablet, capsule, or as a tea to drink. The American Society of Health-System Pharmacists conducted a study evaluating 20 different products containing ephedra. The results showed the amount of ephedra alkaloids present in the supplements often differed markedly from the amount stated on the label. Follow the advice of a knowledgeable health care provider with experience in botanical medicine.
Ephedra should be used only on a short-term basis because prolonged use may lead to addiction. The amount of time considered safe, however, is not clear. Use of ephedra should take place only under the guidance and supervision of an appropriately trained specialist. Ephedra should be taken between meals, without food.
The American Botanical Council warns that anyone under the age of 18 should not use ephedra without strict medical supervision.
The German Commission E concluded in 1991 that single adult doses of ephedra should correspond to 15 - 30 mg of total ephedrine alkaloid. Current clinical practices are often more conservative.
Herbs contain active substances that can trigger side effects and interact with other herbs, supplements, or medications. For these reasons, you should take herbs only under the supervision of a health care provider knowledgeable in the field of botanical medicine.
Ephedra can produce side effects, such as irritability, restlessness, anxiety, insomnia, headaches, nausea, vomiting, and urinary problems. More serious side effects include high blood pressure, rapid or irregular heartbeat, stroke, seizures, addiction, and even death. If you experience any of these adverse effects, discontinue using ephedra and contact your health care provider immediately.
You should not take ephedra if you have the following health conditions: anxiety, depression, high blood pressure, glaucoma, heart disease, prostate enlargement, difficulty urinating, seizure disorder, impaired circulation to the brain, psychiatric disorders, thyroid disorders, or diabetes. Anyone taking medications for high blood pressure or depression, and women who are pregnant or breastfeeding, should avoid ephedra and ephedra alkaloids such as ephedrine. To determine whether ephedra is safe and appropriate for you, consult a knowledgeable health care provider.
While no specific interactions (positive or negative) between the herb ephedra and conventional medications have been reported, the active ingredients of ephedra, ephedrine, and pseudoephedrine have been associated with several serious drug interactions. We may assume, for safety's sake, that drugs that interact with ephedra's active ingredients may also interact with the herb ephedra. Medications for which there are well documented interactions with ephedra's active ingredients include:
- Amphetamine and amphetamine derivatives -- Amphetamine and amphetamine derivatives (such as dextroamphetamine, sometimes used for attention deficit hyperactivity disorder and narcolepsy) should not be used with ephedra. Ephedra may cause increased effects of amphetamines on the body, such as increased heart rate and blood pressure.
- Antidepressants -- Ephedra may interact with antidepressants, namely those in the class of tricyclics (such as clomipramine, desipramine, doxepin, imipramine, and nortriptyline) and monoamine oxidase inhibitors (MAOIs, including phenelzine and trancylcypromine).
- Aspirinand blood-thinning medications -- Ephedra may increase bleeding in sensitive individuals, such as those taking aspirin or other blood-thinning medications.
- Blood pressure medications -- Ephedra may interact with blood pressure lowering medications, particularly clonidine.
- Caffeine and guarana (a caffeine containing herb)
- Narcotics -- Ephedra may interact with narcotics prescribed for pain, such as morphine and codeine; codeine may also be prescribed for cough.
- Theophylline -- Ephedra may interact with theophylline (used for asthma).
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