It is not suggested that half used syringes of any filler product be reused at a later date. Many physicians who attempt to save money for their patients, will label and save half-used syringes for use at a future appointment.
It is not recommended that this be done for a variety of reasons, but primarily you don't want the remaining product in the syringe to become dried out or contaminated. The syringes come sterile in the original packages, and once the product has been opened, you cannot guarantee sterility.
Also, it is possible that labels could get mixed up when a large number of syringes are stored.
The manufacturers of these products warn against this practice. Naturally, this means that it could cost you slightly more, but better to be safe than sorry.
