1. Unnecessary drug therapy. This could occur when the patient has been placed on too many medications for their condition and the drug is simply not needed.
2. Wrong drug. This could occur when a patient is given medication that does not treat the patient's condition. Ex. A heart medication to treat an infection.
3. Dose too low. This could occur when a patient is given medication that is not strong enough to get beneficial or therapeutic effects.
4. Dose too high. This could occur when a patient is given medication that is too strong and is causing detrimental effects or is simply not necessary.
5. Adverse drug reaction. This could occur when a patient has an allergic response to a medication.
6. Inappropriate adherence. This could occur when a patient chooses not to or forgets to take a medication.
7. Needs Additional Drug Therapy. This could occur when a patient needs more medication to treat their condition