Cost of medicines within the nhs

Hold an investigation into the procurement of drugs within the bus. Reports are that routine drugs and medications cost the nhs 3 or 4 times than they do in the high street stores. If this is the case this is absolutely scandalous. If the supermarkets can sell products like paracetamol for pence, why is the nhs buying them for many pounds. If this is the case, there needs to be big changes!