WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Face muscle weakness or uneven smile.
- Very bad irritation where the shot was given.
- Trouble swallowing.
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Bleeding where the shot is given.
- Area that feels hard, numbness, or bruising where the shot was given.
- Redness or swelling where the shot is given.
- Pain where the shot was given.
- Irritation where the shot is given.