1. Penicillin reverses resistance of mycobacterium to INH. 2. Penicillin as claimed in claim 1 can be a broad spectrum penicillin or a narrow spectrum penicillin. 3. Penicillin as claimed in claim 1 and 2 can be any single penicillin or combination of more than one penicillin. 4. Penicillin as claimed in claim 1 to 3 can have activity against beta-lactamase producing organism. 5. Penicillin as claimed in claim 1 to 3 can have activity against penicillinase producing organism. 6. Penicillin as cl...

1. The method of treating drug-resistant mycobacterial infection in an animal comprising administration to the said animal Penicillin and isoniazid (INH). 2. The method of claim 1 wherein penicillin is administered simultaneously with INH. 3. The method as claimed in claim 1 wherein penicillin and INH are administered sequentially. 4. The method as claimed in claim 1 to 3 wherein penicillin can be a broad spectrum penicillin or a narrow spectrum penicillin. 5. The method as claimed in claim 1 to...