Momo, my cat, is sneezing and acting like he is trying to get rid of something in his throat/nostrils. The vet took an X-ray of his lungs and chest and found "shadows" around them, and concluded that there is infection.
So now my cat is on medication from the vet but isn't getting better (or may be not getting better fast enough). He has been on antibiotics for a week. Now the vet has given him another kind of antibiotics plus an expectorant but I feel he is as clueless as I am about what is happening.
Anyone has had similar cat problems? What could be happening?
Momo, my cat, is sneezing and acting like he is trying to get rid of something in his throat/nostrils. The ... is as clueless as I am about what is happening. Anyone has had similar cat problems? What could be happening?

Jason we are not vets Sounds like the infection is not being cured. I would call another vet for another opinion
Get copies of the x-rays/bloodwork/other records and see another vet for a second opinion. It's possible he might not even have an infection if the medication isn't helping.
Momo, my cat, is sneezing and acting like he is ... Anyone has had similar cat problems? What could be happening?

Jason we are not vets

But of course you do not know that no one reading this group is a veterinarian, Madden.
Momo, my cat, is sneezing and acting like he is trying to get rid of something in his throat/nostrils. The ... is as clueless as I am about what is happening. Anyone has had similar cat problems? What could be happening?

There is another group that might be worth asking. alt.med.veterinary
Good luck.