Introduction
Carbonyl Iron and Folic Acid combination is a supplement commonly used to treat or prevent iron deficiency anemia and folate deficiency. Carbonyl iron is a pure form of iron with high bioavailability and lower risk of toxicity compared to other iron salts. Folic acid, a form of vitamin B9, is crucial for DNA synthesis, cell division, and proper red blood cell formation.
Uses
The Carbonyl Iron and Folic Acid combination is primarily used for:
- Treatment and prevention of iron deficiency anemia
- Prevention of folate deficiency anemia
- Supplementation during pregnancy to support increased iron and folate demands
- Support in managing anemia due to chronic blood loss or malnutrition
| Brand Name | Pregmin |
|---|---|
| Type | Capsule |
| Weight | 50 mg+0.5 mg |
| Generic | Carbonyl Iron + Folic Acid |
| Manufacturer | Rangs Pharmaceuticals Ltd. |
| Available in | English বাংলা |
Mechanism of Action
Carbonyl iron is absorbed in the gastrointestinal tract, where it is slowly reduced to ferrous iron and integrated into hemoglobin for red blood cell production. Folic acid is essential for DNA synthesis and repair, promoting proper red blood cell maturation and preventing megaloblastic anemia.
How Long Does It Take to Work?
The therapeutic effects on anemia may take 3-6 weeks to become noticeable, with full replenishment of iron and folate stores occurring over several months of consistent use.
Absorption
Carbonyl iron is absorbed more slowly than other forms of iron, leading to a lower risk of gastrointestinal side effects and overdose. Folic acid is absorbed rapidly in the proximal small intestine and converted to its active form in the liver.
Route of Elimination
Excess iron is primarily excreted via the gastrointestinal tract, with minor amounts excreted in urine and sweat. Folic acid is metabolized by the liver, and excess folate is excreted through urine.
Dosage
Adult: One capsule daily before food or as directed by the physician.The typical dosage depends on the patient's needs:
- For adults: 50-100 mg of Carbonyl Iron and 0.4-1 mg of Folic Acid daily.
- During pregnancy: 30-60 mg of Carbonyl Iron and 0.6-0.8 mg of Folic Acid daily.
- The dosage may vary based on the severity of anemia or deficiency.
Administration
- Administer orally with or without food; taking with food may reduce gastrointestinal side effects.
- Swallow the tablet or capsule whole with water.
- Avoid taking with calcium-containing products or antacids, as they may inhibit iron absorption.
Side Effects
- Nausea and vomiting
- Constipation or diarrhea
- Dark stools (a harmless side effect of iron)
- Abdominal discomfort or cramping
- Allergic reactions (rare, but may include rash or itching)
Toxicity
Carbonyl iron is less toxic than other forms of iron, but overdose can still cause serious symptoms, especially in children. Symptoms of iron toxicity include nausea, vomiting, diarrhea, abdominal pain, lethargy, and in severe cases, cardiovascular collapse and liver failure. Folic acid overdose is rare, but very high doses may mask vitamin B12 deficiency.
Precautions
- Patients with a history of gastrointestinal disorders should use Carbonyl Iron cautiously.
- Patients with hemochromatosis or other iron overload disorders should avoid iron supplements.
- Folic acid supplementation in high doses should be avoided in patients with undiagnosed vitamin B12 deficiency, as it may mask the symptoms of nerve damage.
Interaction
- Calcium, antacids, and certain foods may reduce iron absorption.
- Iron supplements may decrease the absorption of tetracyclines, fluoroquinolones, and levothyroxine.
- Folic acid may reduce the effectiveness of some anticonvulsants (e.g., phenytoin, phenobarbital).
Disease Interaction
- Hemochromatosis (iron overload disorder)
- Chronic liver disease
- Renal impairment
- Gastrointestinal diseases (ulcers, colitis)
Drug Interaction
- Antacids, calcium supplements, and dairy products may reduce iron absorption.
- Iron supplements may reduce the absorption of certain antibiotics like tetracycline and ciprofloxacin.
- Folic acid may interact with certain anticonvulsants, decreasing their efficacy.
Food Interactions
- Foods high in vitamin C (e.g., citrus fruits) can enhance iron absorption.
- Dairy products, tea, coffee, and eggs may reduce iron absorption.
- Alcohol may interfere with folic acid metabolism and should be avoided.
Pregnancy Use
Carbonyl Iron and Folic Acid are widely recommended during pregnancy to prevent iron deficiency anemia and neural tube defects in the developing fetus. The typical daily dose during pregnancy is 30-60 mg of Carbonyl Iron and 0.6-0.8 mg of Folic Acid.
Lactation Use
Iron and folic acid are excreted in breast milk in minimal amounts and are considered safe for use during breastfeeding. Adequate intake during lactation helps support the mother’s health and ensures sufficient folate levels for both the mother and infant.
Acute Overdose
Acute iron overdose is a medical emergency, especially in children. Symptoms include vomiting, diarrhea, abdominal pain, lethargy, and, in severe cases, shock and organ failure. Immediate medical intervention, including gastric lavage and chelation therapy, may be required. Folic acid toxicity is rare but can occur in very high doses.
Contraindication
- Known hypersensitivity to any of the components
- Patients with iron overload disorders (e.g., hemochromatosis, hemosiderosis)
- Patients with pernicious anemia (folic acid may mask B12 deficiency symptoms)
Use Direction
- Take Carbonyl Iron and Folic Acid once daily, or as directed by your healthcare provider.
- If taking more than one dose, space doses evenly throughout the day to maximize absorption.
- Missed doses should be taken as soon as remembered, but do not double the dose to catch up.
Storage Conditions
- Store at room temperature (15-30°C or 59-86°F).
- Keep in a dry place, away from moisture and heat.
- Keep out of reach of children, as iron overdose can be fatal to children.
Volume of Distribution
Carbonyl iron has a slow absorption rate, leading to a controlled distribution primarily to the bone marrow for incorporation into hemoglobin. Folic acid is widely distributed throughout the body, especially in the liver, where it is metabolized.
Half-Life
Carbonyl iron has a variable half-life based on individual iron stores and needs. Folic acid has a half-life of approximately 6 hours, with longer retention in the liver and tissues.
Clearance
Iron is primarily cleared through the gastrointestinal tract, with excess amounts excreted in feces. Folic acid is cleared primarily through the kidneys, with excess folate excreted in urine.
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