If you mean Falcigo injection (artesunate) for severe malaria:

It is usually given at 0, 12, and 24 hours, then once daily until oral antimalarial treatment can be taken, followed by a full oral ACT course. This must be prescribed and administered in hospital because severe malaria is an emergency. WHO-based dosing table

Please confirm the exact name on the vial, because “Falciform” may be a different brand or a spelling variation.