Yes surely go ahead with Taxim 100mg twice daily.
But this will only temporarily relieve the symptoms. So the final treatment will the Root Canal treatment with respective tooth and crown placement
Next Steps
Contact your dentist and continue your treatment(if possible contact a Pedodontist)
Health Tips
Do not apply any heat or creams over the swelling area.
Advice patient not to eat sweets, any hot substances like tea or coffee .
In case of any discomfort contact near by dentist ASAP.