The following is from handouts that I was given when my dd was immunized with the DTaP vaccine. You don't say what other vaccines your baby also received so I don't know what other side effects there might be.
Side Effects
Mild reactions 1 to 3 days after the DTaP shots are common, especially after the 4th and 5th doses. Your child may:3
- Have a fever.
- Have redness or swelling where the shot was given. Sometimes an arm or leg swells for 1 to 7 days after the shot.
- Be sore or tender where the shot was given.
- Be fussy or tired.
- Not feel like eating or drinking.
- Vomit.
Mild to moderate reactions to Tdap are also common and may include:4
- Pain, redness, and swelling where the shot was given.
- Headache.
- Tiredness.
- Nausea, vomiting, diarrhea, and stomach ache.
- Fever.