I want to estimate antibiotics use in certain hospitals as part of assessing antibiotic stewardship programmes. what method is the best? what is the formula for arriving at monthly and yearly drug use?
You can check Registers or computer...and match with susceptibility results in lab so that to check whether antibiotic use was proper...or your institute's antibiotic policy is followed.
An alternative is to measure the concentration of the antibiotic in the collected waste water from the hospital. Then multiply this with the vaste water volume. This method has been used to determine the use of drugs in whole communities.