Warnings on Guarana

Guarana is an herbal supplement that you will find in the ingredients list for a variety of different products, including energy drinks and some soda drinks. Guarana contains a large amount of caffeine, making it a worthwhile addition to commercial energy drink products. There are some important warnings to consider when it comes to guarana and caffeine content, however.


Guarana can aggravate a number of conditions. If you have hypertension (high blood pressure), diabetes, glaucoma, osteoporosis or anxiety, then you should consult your physician before you consume guarana. If you have any heart problems, speak to a doctor before you take caffeine or guarana in excessive amounts. If you are allergic to any dyes, foods or preservatives, it is important to talk to your healthcare provider before you take guarana.

Caffeine Warning

Guarana is made up of a significant amount of caffeine. Caffeine in large doses can cause issues with certain health issues. For example, guarana and caffeine can aggravate an anxiety disorder, making it worse. If you notice that you are experiencing an increase in anxiety while consuming guarana, stop and consult your doctor to determine the cause. The caffeine in guarana can also aggravate some heart conditions. You should never take guarana if you have a heart condition unless you consult your physician beforehand.

Pregnancy and Breastfeeding

As of 2010, it is not known what kind of an effect guarana can have on women who are pregnant or breastfeeding. If you are pregnant or might be pregnant, then you should consult your physician before you consume guarana. Your doctor will give you advice on whether or not a specific level of guarana is safe for you.

Medication Interactions

Guarana can interact with some medications. This includes caffeine and other stimulants such as cocaine or amphetamines and weight loss supplements. Guarana can also interact with cimetidine, cozapine, fluoroquinolone antibiotics, diabetes medications, fluvoxamine, mexiletine and theophylline. Do not take guarana without first consulting a physician if you are using any of these medications or supplements because they can pose a threat to your health.