Tachycardia
Tachycardia (if your heart beats faster than usual, more than 100 beats per minute) can be a normal response to exercise or stress or a sign of disease
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Wolff-Parkinson-White syndrome
Wolff-Parkinson-White syndrome (WPW) can cause episodes of fast heartbeat, or tachycardia. Learn more here about the symptoms and treatments for WPW.
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Postural orthostatic tachycardia syndrome (POTS)
Postural orthostatic tachycardia syndrome (POTS) causes a fast heartbeat and other symptoms when you stand up. Learn how to manage POTS.
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Vitamin B deficiency
Vitamin B deficiency can happen when you don’t get enough of the right nutrients. Learn about the symptoms of vitamin B deficiency.
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Rabies
Rabies in humans is caused by a bite or scratch from an infected animal. Learn what to do if you are bitten by an animal that may have rabies.
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Jellyfish stings
Jellyfish stings are common and mostly just painful. If serious, you may need emergency medical attention. Read this page on jellyfish sting treatment.
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Calcium channel blockers (CCB)
Find out what the most common types of calcium channel blockers are used for, how they work and any side effects associated with taking them.
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Chronic fatigue syndrome (Myalgic Encephalomyelitis)
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complicated condition characterised by ongoing, unexplained tiredness.
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Ketamine
Ketamine is a drug used by doctors and vets. It can also be used illegally to get high. Learn more about ketamine and the dangers of long-term abuse.
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Opioids
Opioids are a group of medicines prescribed by doctors to treat pain. Learn about side effects, withdrawal symptoms and what to do in an overdose.
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