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Medication guide

Ferrous sulfate: uses, appearance and warnings

What the official FDA label says Ferrous sulfate is used for, what it looks like, and its most important warnings — in plain English, with the label text one click away.
Iron bivalent, oral preparationsOver-the-counter label

Uses

What the official label says Ferrous sulfate is used for

The FDA label for Ferrous sulfate states:

See symptoms on front panel. Relieves hot flashes with headaches *
Read the label's “Indications and usage” section (verbatim)
See symptoms on front panel. Relieves hot flashes with headaches *

Names & forms

Brand names, forms and strengths

Brand names (from RxNorm; not every brand is still sold): Feosol, Fer-in-Sol, Slow-Fe.

Generic name: ferrous sulfate · RxNorm ID (RxCUI): 24947

Forms and strengths of Ferrous sulfate listed in RxNorm
FormStrengths listed in RxNorm
Delayed Release Oral Tablet324 MG, 325 MG
Extended Release Oral Capsule250 MG
Extended Release Oral Tablet137 MG, 140 MG, 142 MG, 143 MG, 144 MG, 159 MG, 160 MG, 168 MG, 250 MG, 325 MG
Oral Solution44 MG/ML, 60 MG/ML, 75 MG/ML, 116 MG/ML, 125 MG/ML
Oral Tablet27 MG, 88 MG, 90 MG, 134 MG, 200 MG, 300 MG, 325 MG
Topical Powder840 MG/MG

Strengths are listed so you can recognise a product — not as dosing information. Only your prescriber can decide what is right for you.

Appearance

What Ferrous sulfate looks like

Illustration: white round pellet

ferrous sulfate 200 [kp_C] per 200 [kp_C]
Boiron

Illustration: red round tablet

ferrous sulfate 325 mg
Richmond Pharmaceuticals Inc.

Illustration based on label data — not a photo; appearance varies by manufacturer. Confirm with your pharmacist.
Appearance of Ferrous sulfate products from DailyMed product data
StrengthFormColourShapeSizeImprintScoreLabeler
ferrous sulfate 200 [kp_C] per 200 [kp_C]pelletwhiteround4 mm——Boiron
ferrous sulfate 325 mgtabletredround8 mm—1Richmond Pharmaceuticals Inc.

From the product data in each manufacturer's label on DailyMed. Many companies make Ferrous sulfate, so your medicine may look different from any shown here. If a pill looks unfamiliar, ask your pharmacist before taking it.

Safety

Important warnings for Ferrous sulfate

This is not a complete list of warnings or side effects. Read the full label and talk to your prescriber or pharmacist. To report a side effect to the FDA, use MedWatch.

Resources

If you were hurt at work

Whether a medicine is right for you is a decision for your prescriber. If you were injured on the job, these educational guides explain the next steps and who can help.

Sources

Label text is quoted from the Boiron label (label version effective July 21, 2025), retrieved October 20, 2026. Other manufacturers' labels for the same medicine may differ in wording.

If anything here differs from the label that came with your medicine, follow your label and your pharmacist.

Prescriptions.plus is an educational portal. We are not a pharmacy, law firm, medical provider, insurer or claims administrator, and nothing here is medical or legal advice. Educational purposes only. This page does not tell you whether to take a medicine or how much to take. Medical emergency? Call 911. Poison emergency: call Poison Control at 1-800-222-1222.