What is the brand name for Ferrous Sulfate?
The brand name for Ferrous Sulfate is Feosol (OTC).
PTCE Top 200 · #89
Ferrous Sulfate
Feosol (OTC)
Ferrous Sulfate is the generic name for the brand-name drug Feosol (OTC). It is an iron supplement used to treat iron deficiency anemia. On the PTCE Top 200 drug list, Ferrous Sulfate ranks #89 and is one of the most frequently tested vitamins/minerals/supplements medications — commonly quizzed on its brand–generic pair, drug class, and key side effects.
| Generic name | Ferrous Sulfate |
|---|---|
| Brand name(s) | Feosol (OTC) |
| Drug class | Iron supplement |
| Class group | Vitamins/Minerals/Supplements |
| Common use | iron deficiency anemia |
| DEA schedule | Unscheduled |
| Availability | OTC/Rx |
What is Ferrous Sulfate used for?
Iron supplement used to prevent and treat iron‑deficiency anemia.
What drug class is Ferrous Sulfate?
Ferrous Sulfate is an Iron supplement in the Vitamins/Minerals/Supplements group. Knowing the class is the fastest way to predict its uses, side effects, and the brand↔generic pairs the PTCE tests.
Common side effects of Ferrous Sulfate
- arrow_rightConstipation
- arrow_rightStomach upset
- arrow_rightNausea
- arrow_rightDark stools
- arrow_rightAbdominal pain
- arrow_rightHeartburn
Major interactions
- arrow_rightIron reduces absorption of levothyroxine, tetracyclines, and fluoroquinolones—separate dosing
- arrow_rightAntacids/calcium supplements can ↓ iron absorption; vitamin C can ↑ absorption
- arrow_rightIron may irritate GI tract—avoid taking with other GI‑irritating meds if possible
Is Ferrous Sulfate a controlled substance?
No. Ferrous Sulfate is not a federally controlled substance (it is unscheduled by the DEA).
How to remember Ferrous Sulfate (PTCE mnemonic)
FE-osol = FE (iron symbol) sulfate — ferries iron for Hgb. Take with vitamin C (↑absorption), empty stomach if tolerated; CONSTIPATION + DARK stools; separate from tetracyclines/levothyroxine.
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PTCE exam tip
Ferrous sulfate is oral iron — take on an empty stomach (vitamin C aids absorption), expect dark stools, and remember it's a top pediatric poisoning hazard.
Ferrous Sulfate FAQ
What is Ferrous Sulfate used for?
Ferrous Sulfate is used to treat iron deficiency anemia. Iron supplement used to prevent and treat iron‑deficiency anemia.
What drug class is Ferrous Sulfate?
Ferrous Sulfate is an Iron supplement (Vitamins/Minerals/Supplements group).
Is Ferrous Sulfate a controlled substance?
No. Ferrous Sulfate is not a federally controlled substance (it is unscheduled by the DEA).
Related drugs in the Vitamins/Minerals/Supplements group
Drill Ferrous Sulfate the way the PTCE asks it
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Last reviewed June 25, 2026. Educational use only — not medical advice. Verify clinical specifics with your pharmacist or a current label source such as DailyMed. RxReflex is not affiliated with or endorsed by the Pharmacy Technician Certification Board (PTCB).