Hello.
Thank you for posting your query at DoctorSpring.com
I understand your concern.
Throat pain coupled with fever and sputum and also chest congestion points towards respiratory tract infection as you rightly said.
Even his reports indicate a bacterial infection.
It is good to know that he is a doctor too. I will advise he continues with Ceftum 500 mg twice daily 1-0-1 for 7 days. For his throat pain he needs saline water gargling, 3-4 times a day. Along with that since he also has a lot of chest congestion, i will advise Tab. Montelukast-Levocet ( Montek-LC) combination, once at bed time. That will also help in relieving the congestion. It should be taken at bed time, since it can make the patient slightly drowsy.
In case there is fever, then OTC Paracetamol DOLO 650 can be given SOS.
In my opinion, let him continue the medicine properly for 2 days and then if it doesn't settle, then he can get a Chest X-RAY done.
I strongly recommend you don't change the antibiotic again because it can lead to resistance causing more harm.
Hope this was helpful,
Regards.