The patient develops constipation after taking the daily iron supplement that was prescribed by the physician.Which term accurately describes the patient's reaction to the supplement?

A) Therapeutic effect
B) Adverse reaction
C) Side effect
D) Toxicity

Therapeutic Effect

The beneficial effects of a treatment on the symptoms or course of a disease, often the goal of medical therapy.

Iron Supplement

A dietary supplement used to treat or prevent iron deficiency such as in cases of anemia.

Constipation

A common condition characterized by infrequent bowel movements, difficulty passing stools, or the sensation of incomplete evacuation.