A pharmacist giving medicines without a prescription

Q: I am a pharmacist. Sometimes I sell medicines without prescriptions, or sell more than the prescribed quantity for whomever demands that, especially when the patient is an old person, who considers it difficult to come back again. I would like to tell you that these medications (Part No. 24; Page No. 435) are in great demand and there are no sufficient quantities. Moreover, we are instructed not to sell any drugs without a prescription. Am I sinful for what I do? What is the legal ruling on this? What should I do, bearing in mind that this causes me embarrassment among my colleagues, but I have sympathy for patients, especially the old ones, as I said? Kindly give us the legal Fatwa in this regard. May Allah reward you with the best.

A: It is impermissible for you to sell medications other than the quantity prescribed by a doctor to a patient.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.