Wow are you that stupid to think the cost of giving you a narcotic shot just costs a dollar? First you have the cost of the drug, then secure storage so those of your ilk don't steal it. Then the syringe and needle (or IV set up) and the cost of disposal of those items, you can't just throw those in the trash. The pharmacist to supply the shot. The nurse to give it to you and to monitor you after. The doctor that has to prescribe it. The narcan that has to be on hand if you have a reaction to the shot to save your life. Plus the cost to the hospital for all those indigents that can't or won't pay for hospital services when they use the ED like a doctor's office.
I am sure I am forgetting a few things.
Overhead. Someone has to purchase the morphine and supplies, someone has to inventory it and accounting has to bill the patient and also has to pay the vendors who supplied it.
I'm sure hospitals use a formula for applying overhead costs.
Any type of business has to pay for rent, utilities, repairs, equipment, insurances, licenses, payroll, blah, blah, blah and there has to be some way of applying all of that to the products sold.