Vitamin C: Prolonged intake of Vitamin C in excess of 2 g/day may lead to nausea, abdominal cramps, diarrhea, and nose bleeds.
Zinc: Rare occurrences of acute zinc poisoning have been reported. The toxicity signs observed after ingestion of high zinc doses (4 to 8 grams) include nausea, vomiting, diarrhea, fever, metallic taste, and lethargy (sleepiness).
If the patient has taken more than the recommended dosage, consult a doctor.