Xenadrine Side Effects

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Xenadrine® is a weight loss supplement manufactured by Cytodyne Technologies that is also marketed to increase energy and intensify metabolic functions. The supplement's manufacturer claims that during clinical trials, individuals who took Xenerdrine lost seven times more weight than those who dieted without the supplement. However, since Xenedrine is not monitored by the Food and Drug Administration, this information has not been verified.[1]

In April of 2004, the FDA banned ephedra, one of the main ingredients in supplements like Xenadrine®.[2] As a result, Cytodyne Technologies removed the products, and reconstructed their formula. Adverse reactions that individuals may experience from Xenedrine are generally mild. Common Xenedrine side effects may include headache, nausea, and difficulty sleeping.[3]


Flickr: austinevan
Types of products Capsules, drink mix
Manufacturer Cytodyne Technologies[1]
Uses Weight loss supplement and as a way to increase energy[1]
Common side effects Nausea, vomiting, anxious feelings, fast heartbeat[3]
Who should not take Xenadrine®? Individuals under the age of 18[4]
Disclaimer The information provided by PharmacyDrugGuide.com is not a substitute for professional medical advice, diagnosis, or treatment. Do not take any action based on the information on this page without consulting a physician.
Author Allison Hughes


Common Xenadrine® Side Effects

One of the main ingredients in Xenadrine® is caffeine anhydrous, which may cause numerous side effects.[5] The most common side effects associated with it include nausea, problems sleeping, feelings of restlessness, a rapid heartbeat, vomiting, and anxious feelings. In addition to these side effects, caffeine anhydrous may also cause individuals to experience withdrawal symptoms, which include headaches, nausea, feelings of drowsiness, and irritability.[3]

About Drug Side Effects

Details about drug side effects

Xenadrine® Allergic Reactions

Some individuals who take Xenadrine® may experience an allergic reaction if they are sensitive to any of the active or inactive ingredients in the supplement. These ingredients include caffeine anhydrous, L-theanine, L carnitine, vitamin C, calcium, wild olive leaf extract, horsemint leaf extract, frauenmantle leaf extract, cormino extract, yohimbe bark extract, white willow bark extract, magnesium stearate, microcrystalline cellulose, dicalcium phosphate, silicon dioxide, and tricalcium phosphate.[5] Symptoms of an allergic reaction may include swelling of the face, problems swallowing, a rash accompanied by itching or hives, and sinus congestion.[6]

Xenadrine® Precautions and Warnings

  • Cytodyne Technologies recommends individuals not consume more than six tablets over a 24-hour period. In addition, Cytodyne recommends that individuals who weigh less than 150 pounds use half the normal dose for the first week.[7]
  • Cytodyne Technologies does not recommend that patients take Xenedrine within five hours of bedtime.[7]
  • Xenadrine® is not recommended for anyone under the age of 18.[4]


Also See: Drug Side Effects, Muscle Milk Side Effects, Calcium Coupons, Potassium Side Effects, Magnesium Side Effects, Milk Thistle Side Effects, Echinacea Side Effects, Flaxseed Oil Side Effects, Acidophilus Side Effects, CoQ10 Side Effects, L Arginine Side Effects



  1. 1.0 1.1 1.2 http://www.xenadrine.com/
  2. http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/2004/ucm108379.htm
  3. 3.0 3.1 3.2 http://www.nlm.nih.gov/medlineplus/ency/article/002445.htm
  4. 4.0 4.1 http://www.xenadrine.com/calculators/
  5. 5.0 5.1 http://www.xenadrine.com/products/xenadrine/
  6. http://www.nlm.nih.gov/medlineplus/ency/article/000005.htm
  7. 7.0 7.1 http://www.xenadrine.com/products/xenadrine/