Final answer:
The statement 'I will call my healthcare provider if my stools turn black' indicates a need for further instruction. Black stools are a common side effect of taking ferrous sulfate and do not usually require contacting a healthcare provider.
Step-by-step explanation:
The patient statement that indicates a need for additional instruction about taking oral ferrous sulfate is: "a. I will call my healthcare provider if my stools turn black." Black stools are a common and expected side effect of iron supplementation, hence this statement suggests the patient might not understand what is considered a normal reaction to taking ferrous sulfate.
It is recommended for patients taking ferrous sulfate to increase their fluid and fiber intake to prevent constipation, and taking the supplement with a vitamin C source such as orange juice can enhance iron absorption. A stool softener may be used if constipation occurs, which is a possible side effect of iron supplements.
Treatment of iron deficiency anemia typically includes oral iron therapy with ferrous sulfate, ferrous fumarate, or ferrous gluconate. Intramuscular and intravenous preparations are available for patients who cannot tolerate oral iron.