Guarana is a vine plant that can be found growing in the Amazon rain forest. Because of its high caffeine content, it is often used as a stimulant and can be found in energy drinks and similar products. It has also been used medicinally as an herbal remedy for conditions such as diarrhea, headaches and arthritis, according to Langone Medical Center at New York University. Most of the negative effects of guarana are related to its high caffeine content. Before using it as a stimulant or to improve your health, consult a medical professional to advise you on its safety.
Insomnia
Because guarana has similar effects as caffeine in the body, some people can develop insomnia as a side effect, according to Langone Medical Center. As with other caffeinated products, like coffee and tea, the more guarana you consume, the more likely you will have difficulty sleeping.
Urinary Frequency
Guarana can have a diuretic effect in the body, just as other caffeinated foods and beverages can. As a result, consuming guarana can increase your urinary output and result in a noticeable increase in urinary frequency, according to the University of Michigan Health System.
Heart Palpitations
Consuming excessive amounts of guarana can cause heart palpitations or a change in your normal heart rhythm. In some cases, these heart arrythmias are harmless, but potentially serious changes to the heart rhythm may also develop, according to Langone Medical Center. If you have a heart condition, consult with your health practitioner before using products containing guarana.
Tremors
Another potential negative effective of guarana consumption is muscle tremors or feeling jittery, according to the University of Michigan Health System. Again, this effect is similar to what some people experience as a result of consuming caffeine. Some people also feel agitated or anxious after using products containing guarana.
Drug Interactions
Use of guarana supplements or products can also cause some potentially serious interactions with medications you may be taking. For example, the caffeine content in the plant can cause potentially dangerous interactions with MAO inhibitors used to treat mental illnesses, according to Langone Medical Center. It may also intensify the effects of stimulants such as Ritalin and interfere with the effectiveness of drugs used to treat insomnia, heart arrhythmias and anxiety. Always discuss your complete medical history, including all medications and supplements you are taking, with a health practitioner before using guarana.
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