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Since Folic acid is a water-soluble vitamin, overdose is rather unlikely to happen. However, the possibility of overdose cannot be discounted especially in patients taking high doses of folic acid in long-term situations such as during pregnancy. In rare cases, patients have shown overdose symptoms that include: Gastrointestinal side effects (such as nausea, vomiting, stomach pain, diarrhea or gas); Rash.
Serious iron poisoning usually causes symptoms within 6 hours of the overdose. The symptoms of iron poisoning typically occur in 5 stages: Stage 1 (within 6 hours after the overdose): symptoms include vomiting, vomiting with blood, diarrhea, abdominal pain, irritability, and drowsiness. If poisoning is very serious, rapid breathing, a rapid heart rate, coma, unconsciousness, seizure, and low blood pressure may develop.
Stage 2 (6 to 48 hours after the overdose): The person's condition can appear to improve.
Stage 3 (12 to 48 hours after overdose): Very low blood pressure (shock), fever, jaundice, liver failure, metabolic acidosis, and seizures can develop.
Stage 4 (2 to 5 days after overdose): The liver fails, and people may die from shock, bleeding, and blood-clotting abnormalities. Sugar levels in the blood can decrease. Confusion and sluggishness (lethargy) or coma can develop.
Stage 5 (2 to 5 weeks after overdose): The stomach or intestines can become blocked by scars. Scarring in either organ can cause crampy abdominal pain and vomiting. Severe scarring of the liver (cirrhosis) can develop later.
If the patient has taken more than the recommended dosage, consult a doctor or a Poison Control Center right away.
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