A heart doctor has issued a warning to anyone using nasal sprays and ibuprofen to combat the flu this winter.
With UK hospitals currently facing a high number of 'super flu' cases, people who are able to will be trying their best to avoid a visit to the doctors.
The World Health Organization (WHO) warned that new flu variant, (H3N2) subclade K, hit at least 27 of the 38 countries in Europe four weeks earlier than normal.
It seems the affected areas, such as Britain, are experiencing 'high or very high influenza activity', with a 'B' strain also predicted to hit us in the new year.
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Symptoms of influenza B include body aches, headaches, tiredness, a runny or stuffed nose, as well as fever and chills.
And people will often turn to over-the-counter medicine, which Dr Aurelio Rojas says could come with some major health risks.
The Spanish cardiologist said on Instagram that certain painkillers, nasal decongestants and Omeprazole 'may be sabotaging your health without your knowledge'.
"And I'm not talking about unusual medications; I'm referring to the ones you take on a regular basis. And many people take them without realising it," he claimed.
Dr Rojas noted that a combination of unchecked consumption and vigorous physical activity may be bad for your heart.
He said of Omeprazole - which reduces the amount of acid produced in the stomach - that it may 'alter the absorption of magnesium, iron and vitamin B12', which 'affects your energy, your recovery and the health of your heart'.
When it comes to nasal sprays, used to treat sinus issues and stuffy noses, he added: "You're going to be shocked about this one: nasal decongestant.
"Yes, those sprays or pills you take when you have a cold.
"Nasal decongestants increase blood pressure, accelerate heart rate, and can cause arrhythmias if used before intense exercise.
"The problem is that many people use them without considering how they might affect their cardiovascular system while exercising.
"If you have a cold, it's best to avoid strenuous exercise or, at least, check with your doctor to see if the medication is appropriate for you at that time."
Also, for patients taking medication for elevated blood pressure while exercising hard, he said: "This is very common to treat hypertension.
"Diuretics can make you lose potassium and magnesium.
"Result: cramps, tachycardia and tension drops in the middle of training."
Anish Vij