A cannula (1) for dispensing fluid products, particularly for vaginal and rectal applications, comprises:a tubular body (2) for containing a fluid product (P), having a first extremity (2a), at which a dispenser opening (3) is formed, and a second open extremity (2b), opposed to the first extremity (2a).A cover cap (4) is fitted onto the tubular body (2) to close the dispenser opening (3).A closing body (5) associated with the tubular body (2) closes the second extremity (2b). The closing body comprises a first element (6) and a second element (7) made in a single body piece and joined along tearable connection means (8, 9, 10). The second element (7) removable by tearing off the first element (6) to act as a anti-tampering seal. The first element (6) is a cylinder partially insertable through the second extremity (2b) to function as a sliding piston inside the tubular body (2) once the second element (7) has been torn off. The cover cap is converted to a push rod for moving the piston by removing longitudinal sections of the cover cap, and then folding over the remaining sections to reduce the cross-section of the push rod.
