What should I do if I accidentally took 15 vitamin C tablets at once?

Taking 15 vitamin C tablets at once constitutes an overdose. You should immediately stop taking them, drink plenty of warm water to promote metabolism, closely monitor physical symptoms, adjust your diet, and subsequently strictly adhere to the recommended dosage to prevent worsening discomfort. If persistent vomiting, blood in urine, or difficulty breathing occurs, seek immediate medical attention.

1. Immediately stop taking: Discontinue intake of any vitamin C supplements or foods containing vitamin C right away to prevent further accumulation, reduce ongoing irritation to the gastrointestinal tract and kidneys, and avoid symptom progression.

2. Drink plenty of warm water to promote metabolism: Consume 200–300 mL of warm water per serving, maintaining a total daily intake of 1,500–2,000 mL. Increasing urine output helps eliminate excess vitamin C through the kidneys and reduces renal burden.

3. Closely monitor physical symptoms: Pay close attention to any gastrointestinal reactions such as nausea, abdominal pain, or diarrhea, as well as other abnormalities like dizziness, fatigue, or skin itching. Seek prompt medical care if symptoms worsen or persist.

4. Adjust diet structure: Temporarily avoid spicy, greasy, and highly acidic foods. Opt for mild, easily digestible foods such as rice porridge or noodles to minimize irritation to the gastrointestinal mucosa and support digestive recovery.

5. Strictly follow dosage instructions thereafter: After full recovery, resume vitamin C supplementation only according to the product's recommended dosage or medical advice. Do not arbitrarily increase or decrease the dose to prevent future overdose.

Before taking vitamin C in the future, carefully read the product instructions and maintain consistent timing and dosage. Store the supplement out of reach of children. If long-term use is needed, regularly consult healthcare professionals to adjust the regimen as appropriate.