Adverse reactions of vitamins

1, long-term use of 2 ~ 3g daily can cause scurvy after drug withdrawal.

2. Long-term use of large amounts of vitamin C can cause urate, cysteine, or oxalate stones.

3. A large number of applications (daily dosage of 1g or more) can cause diarrhea, bright red skin, headache, frequent urination (above 600mg daily), nausea and vomiting, and stomach cramps.

【Precautions】

1. Interference with diagnosis: Large doses will affect the results of the following diagnostic tests:

(1) Fecal occult blood can cause false positives.

(2) Automatic analysis results that can interfere with serum lactate dehydrogenase and serum transaminase concentrations.

(3) urine sugar (copper sulfate method), glucose (oxidase method) can cause false positive.

(4) Urinary oxalate, urate and cysteine ​​were increased.

(5) Increase in serum bilirubin concentration.

(6) The urine pH drops.

2. The following situations should be used with caution:

(1) Cysteineuria.

(2) Gout.

(3) High oxalateuria.

(4) Oxalate deposition.

(5) Urate renal stones.

(6) Diabetes (due to vitamin C may interfere with blood glucose quantification).

(7) Glucose-6-phosphate dehydrogenase deficiency (can cause hemolytic anemia).

(8) Hemochromatosis.

(9) Ferrogranulocyte anemia or thalassemia (increased iron absorption).

(10) Anaplastic red blood cell anemia (can cause hemolytic crisis).

3. After a large number of long-term use of this product, it is appropriate to gradually reduce the withdrawal.