Thanks for your query.
Fluids in pleural cavity
(what you call between lungs and ribs), commonly known as pleural effusion
. There are many cause for that including tuberculosis
. Inj ambistryn is given for that along with few other drugs. I think you must post the reports of the pleural fluid and exactly what drug was given to him to help me better understand the disease.
What I feel is they have started anti tubercular treatment. Your cousin developed drug induced hepatitis
so the proper treatment was stopped and modified regimen was started.
There is nothing to get worried......plz post the details for further advice....