Is a pharmacist's selling of free medical samples – after erasing any indication that they are free – unlawful, and must an employee quit their job because of it?

It is not permissible to sell free drug samples, because they are not the absolute property of the doctor and are stamped with the phrase "free medical sample" to prevent their sale. Erasing this phrase to sell them is considered falsification, deception, and unlawfully consuming wealth. Therefore, it is not permissible for the questioner to sell these drugs, and she must condemn this, or leave her job at the pharmacy if her work directly entails this prohibited sale, in accordance with the Almighty's saying: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression."