Like all medicines, vaccines can cause side effects. Most of these are mild, don’t last very long, and not everyone gets them. The most common side effects should only last a day or two.
Common or very common side effects
The most common side effects in the first day or two after vaccination are:
pain, redness, itching or swelling where the injection was given
headache
stomach pain
feeling or being sick
diarrhoea (upset stomach)
feeling tired
muscle aches and pains
chills
fever, and
generally feeling unwell.
You can rest and take the normal dose of paracetamol (follow the advice in the packaging) to help make you feel better. Do not use machines or drive if you are feeling unwell.
Rare side effects
Rare side effects from the vaccine include allergic reactions. Symptoms can include swelling of the face, lips, tongue or throat, hives (a raised, itchy rash), difficulty swallowing, and feeling dizzy.
All side effects are included in the patient information leaflet for the vaccine. For more information on side effects, visit:
Shingrix - (emc) (medicines.org.uk) (external site)
If your symptoms get worse or if you are concerned, contact NHS 111 Wales by calling 111 or contact your GP surgery. Calls to NHS 111 Wales are free from landlines and mobile phones.
You should report suspected side effects of vaccines and medicines online at www.mhra.gov.uk/yellowcard (external site), by downloading the Yellow Card app, or by calling 0800 731 6789 (Monday to Friday, 9am to 5pm).
Call 999 immediately if you have had the vaccine and experience any of the following.
Difficulty breathing
Prolonged fainting, confusion or unconsciousness
Swelling of the face, neck or tongue
These symptoms may be a sign of a serious allergic reaction and usually happen within 15 minutes of being vaccinated.