Guarana is also known as Paullinia cupana, paullinia, Brazilian cocoa, guarana bread, guarana paste or gum, and zoom. Guarana is also present in some soft drinks imported from South America in a manner similar to American soft-drinks fortified with caffeine.
Guarana contains very high concentrations of caffeine and has been used as a stimulant and appetite suppressant.
The use of guarana in cultural and traditional settings may differ from concepts accepted by current Western medicine. When considering the use of herbal supplements, consultation with a primary health care professional is advisable. Additionally, consultation with a practitioner trained in the uses of herbal/health supplements may be beneficial, and coordination of treatment among all health care providers involved may be advantageous.
Guarana, or its active constituent caffeine, should not be taken when formulated with ephedrine in diet aids or performance-enhancing supplements. Potentially fatal irregular heartbeats have been reported to occur.
Talk to your doctor or health care provider before taking guarana if you have:
1.heart problems or high blood pressure,
2.kidney disease,
3.an overactive thyroid (hyperthyroidism), or
an anxiety or nervous disorder.
Although rare, serious side effects from guarana have been reported. Stop taking guarana and seek emergency medical attention if you experience:
1.a serious allergic reaction including difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives; or
2.irregular heartbeats or chest pain.
Other less serious side effects may also reported with the use of guarana. Talk to your doctor or health care provider if you experience:
1.heartburn;
2.upset stomach;
3.loss of appetite;
4.constipation or diarrhea;
5.nervousness, irritability, or anxiety;
6.sleeplessness;
7.irregular heartbeats; or
8.headache.
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