Question

healthcare professionals prescribe drugs to
treat diagnosed conditions
give drugs without a diagnosis
help patients get cheaper drugs
help people avoid their side effects

Explanation:

Healthcare professionals prescribe drugs to treat conditions that have been diagnosed. Prescribing without a diagnosis is unethical and unsafe. Helping with cheaper drugs or avoiding side - effects are not the primary reasons for prescribing; the main goal is treatment of a diagnosed condition.

Answer:

treat diagnosed conditions