Can the MMR-Var vaccine cause fever and decreased appetite?

Question

My 12 month old baby has had a fever for about 24 hours. I have been alternating tylenol and advil since then and it seems to calm his fever but as soon as I try to space it out a bit, it comes back. Last night it was 39.6 before tylenol. Then it fell. Same thing for this morning. 39.2 then it calmed down a bit. A little bit of diharee also since yesterday. His general condition is good, he has less appetite but he eats anyway. Irritable at times. He received his 12 months vaccines 9 days ago. I read that for the MMR-Var, it can be normal to see a fever appear between the 5th and the 12th day after the vaccination.

Naji-tom Samaha · Accepted Answer

Hello ma'am, thank you for your question! Indeed, the vaccination can cause fever, diarrhea, and a little irritability. This is usually mild and temporary. I must advise you that the combination of Tylenol AND Advil is not recommended for fever relief, unless medically indicated . The reason is because one of the two should be sufficient for fever. If, for example, Tylenol does not relieve the fever for at least 4 hours, or Advil for 6 hours, you should see a doctor. Otherwise, just monitor your little one's general condition, making sure he is able to eat/drink (even if a little less), and that the symptoms seem to be subsiding. Sincerely Tom Samaha, pharmacist