Can shingles vaccine cause an allergic reaction?

Mild vaccine side effects
The shingles vaccine has been tested on thousands of people to ensure its efficacy and safety. Most of the time, the vaccine is safely administered without any side effects. When it does cause reactions, they’re usually mild. People have reported side effects including redness, swelling, itching, or soreness in the area of skin where they were injected. A small number of people have complained of a headache after being vaccinated.

Serious side effects
In very rare cases, people have developed a severe allergic reaction to the shingles vaccine. This reaction is called anaphylaxis. Signs of anaphylaxis include swelling of the face (including the mouth and eyes), hives, warmth or redness of the skin, trouble breathing, dizziness, irregular heartbeat, or a slow pulse. If you have any of these symptoms after getting the shingles vaccine, seek medical help right away. Anaphylaxis can be life-threatening