Femara 2.5mg (Letrozole) is a non-steroidal aromatase inhibitor medication that works by blocking estrogen synthesis. Each pack contains 30 film-coated tablets, with each tablet containing 2.5mg of the active ingredient letrozole. It functions as an anti-neoplastic agent. This medication comes in film-coated tablet form for oral administration. The active ingredient letrozole works by inhibiting the enzyme aromatase, which is responsible for estrogen production. As indicated on the packaging, it is classified as a non-steroidal aromatase inhibitor that blocks estrogen synthesis and acts as an anti-neoplastic agent.