My son got his tdap booster this morning in his school and...

Question: 

My son got his tdap booster this morning in his school and when he got home by afternoon he feels sick and dizzy. He vomitted twice now and dizzy. Side effects?

Answer: 

You can find a list of common reactions to vaccines in the HealthLinkBC Files. The HealthLink BC file on the Tetanus, Diphtheria, Pertussis (Tdap) Vaccine can be found here

If you have questions regarding any side effects your son may be experiencing after receiving a vaccine or questions regarding your son's health, it is recommended that you contact your health care provider or HealthLinkBC at 8-1-1. 

Any adverse event (unfavorable or unexpected reaction) following immunization should be reported to your local public health unit.  You can find the contact information for your local public health unit here