Quoting lolajessup:" I'm fairly certain it's 6 mos. the bottle should say. You can give ibuprofen every 6 hrs and Tylenol ... [snip!] ... you. If it stays up with the meds take her in ASAP if it's still 104. If its not 102+ without meds she doesn't need medicated."
Quoting Bettinas:" You have to be careful with ibuprofen because it makes them sick of they haven't been eating. You didn't mention loss of appetite but just to be safe "