Merokem 1 gm Injection is an antibiotic. It kills bacteria by preventing them from forming the bacterial protective covering (cell wall) which is needed for them to survive. Merokem is used to treat a variety of bacterial infections. It is used to treat infection affecting the lungs (pneumonia) and complicated infections of the urinary tract, abdomen, and skin and soft tissue infections. It also treats bacterial infection of the membranes that surround the brain and spinal cord (meningitis) and infections that occur during or after delivery.