Monopolizing goods

Q 2: The price of some medicines goes up and down by the decree of the Ministry of Health. I have some medicines that I bought for a certain price and they should be sold at a given price but their prices increase after a period of time. After that, the ministry raised the prices of some medicines and I have an amount of them that I bought at the old price. Is it permissible for me to sell them at the new price? It should be noted that the ministry imposes penalties for those who sell at the old price.

A: You should act according to the system that has been developed by the state for selling medicine because acting against this system makes you and others incur losses. (Part No. 13; Page No. 187)  May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.