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# Ferrous Ascorbate
## Overview
Ferrous ascorbate is an iron salt complexed with ascorbic acid (vitamin C). The addition of ascorbic acid lowers intragastric pH and acts as a reducing agent, converting ferric iron to the more absorbable ferrous state and enhancing overall bioavailability compared to conventional iron salts.
## Primary Indications
* Treatment of iron deficiency anemia (IDA).
* Prophylaxis of iron deficiency in high-risk populations (e.g., pregnancy, chronic blood loss).
## Adult Dosing
* **Treatment of IDA:** 100 mg elemental iron to 200 mg elemental iron daily, typically administered in 1 or 2 divided doses.
* **Prophylaxis:** 50 mg to 100 mg elemental iron daily.
## Pediatric Dosing
* **Treatment of IDA:** 3 mg to 6 mg of elemental iron/kg/day, administered in 1 to 3 divided doses.
* *Note:* Do not exceed adult maximums. Dosing varies significantly by local institutional protocol and severity of anemia; consult standardized weight-based pediatric formularies.
## Dose Adjustments
* **Renal Impairment:** No specific adjustment required; however, use with caution in patients with chronic kidney disease (CKD) who may require intravenous iron therapy if oral absorption is impaired by systemic inflammation.
* **Hepatic Impairment:** No specific adjustment required; use with caution in patients with iron overload syndromes (e.g., hemochromatosis).
## Contraindications
* Hypersensitivity to iron or ascorbic acid.
* Hemochromatosis, hemosiderosis, or hemolytic anemias.
* Patients receiving repeated blood transfusions.
* Active peptic ulcer disease or inflammatory bowel disease (may exacerbate symptoms).
## Adverse Effects
* **Gastrointestinal:** Nausea, abdominal pain, constipation, diarrhea, and dark/black stools (expected and harmless).
* **General:** Staining of teeth (if liquid form is used; suggest using a straw and rinsing mouth).
* *Note:* GI adverse effects are often dose-dependent and may improve with lower, alternate-day dosing.
## Key Drug Interactions
* **Antacids, H2 blockers, PPIs:** Decreased absorption; separate administration by at least 2 hours.
* **Fluoroquinolones and Tetracyclines:** Iron chelates with these antibiotics, significantly reducing their absorption; separate doses by 2 to 4 hours.
* **Levodopa/Methyldopa:** Iron may reduce absorption; monitor efficacy.
* **Thyroid Hormones (Levothyroxine):** Separate administration by at least 4 hours to avoid reduced thyroid hormone efficacy.
## Monitoring
* **Baseline:** Complete Blood Count (CBC), serum ferritin, and percent transferrin saturation (TSAT).
* **Response:** Reticulocyte count (7–10 days post-initiation), hemoglobin/hematocrit (4 weeks post-initiation).
* **Safety:** Monitor for worsening GI symptoms or signs of iron overload in chronic users.
## Clinical Pearls
* **Bioavailability:** Ascorbic acid increases iron absorption; however, the complex is still best absorbed on an empty stomach. If GI intolerance occurs, it may be taken with food, accepting a slight reduction in absorption.
* **Adherence:** Iron therapy often requires 3–6 months to replenish systemic iron stores after hemoglobin levels normalize.
* **Toxicity Risk:** Iron supplements are a leading cause of fatal pediatric poisoning; keep tablets securely stored away from children.
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**Educational Disclaimer:** This information is for educational purposes only. Clinical practice varies based on institutional protocols and individual patient factors. Always verify current prescribing information, contraindications, and local guidelines via official drug monographs (e.g., Lexicomp, UpToDate, or the manufacturer's package insert) before prescribing or administering medication.
