Side effect of Pfizer and Moderna vaccines added to official list

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A new side effect linked to the Pfizer and Moderna Covid-19 vaccien jabs has been added to the official list by the UK medicines watchdog.

As the vaccine programme continues to roll out across the country, the latest Covid vaccine July updates, “extremely rare reports of myocarditis and pericarditis” have been added to the guidance.

Myocarditis refers to inflammation of the heart muscle, and pericarditis is inflammation of the outer lining of the heart.

‘Seek immediate medical attention’

The Commission on Human Medicines (CHM), the MHRA and the Government’s independent expert advisory body, has conducted a thorough review of suspected adverse reaction reports of myocarditis and pericarditis following Covid-19 vaccination.

After considering the available data, the CHM has advised that healthcare professionals should be alert to signs and symptoms of myocarditis and pericarditis.

Vaccinated individuals are advised to seek “immediate medical attention should they experience a new onset of chest pain, shortness of breath, palpitations or symptoms or arrhythmia”.

The Government states that myocarditis and pericarditis happens “very rarely in the general population”.

The MHRA will “continue to closely monitor cases of myocarditis and pericarditis with all of the currently authorised Covid-19 vaccines”.

‘Extremely rare’

Dr June Raine, MHRA Chief Executive, said: “We have carefully reviewed reports of suspected adverse reactions involving types of heart inflammation known as myocarditis and pericarditis.

"We have concluded that the Covid-19 vaccines made by Pfizer/BioNTech and Moderna may be linked with a small increase in the risk of these very rare conditions.

"The cases tended to be mild and the vast majority recovered with simple treatment and rest."

The Government said: “These reports are extremely rare, and the events are typically mild with individuals usually recovering within a short time with standard treatment and rest.