Cetebe Vitamin C Retard 500 for the prevention and treatment of vitamin C deficiency High-dose vitamin C with long-term effects Vitamin C sustained-release capsules with innovative ZEITPERLEN Vitamin C Continuous supply of vitamin C over several hours Hard capsules to swallow Ascorbic acid (vitamin C) 1-2 capsules per day daily The recommended daily intake must not be exceeded. The Cetebe Vitamin C sustained-release capsules should be taken whole with sufficient liquid. The duration of use depends on your symptoms and the laboratory values determined by your doctor. Do not take for longer than six months without medical advice. Please speak to your doctor or pharmacist before taking Cetebe Vitamin C Retard 500: - if you have suffered from kidney stones in the past or are currently suffering from kidney stones. In this case, you should avoid excessive intake of vitamin C and consult your doctor for advice. - if you suffer from a very rare metabolic disease called erythrocyte glucose-6-phosphate dehydrogenase deficiency. In this case, you must not exceed the stated dosage, as in individual cases, red blood cell dissolution (severe hemolysis) has been observed when taking doses of 4 g or more. Please consult your doctor about this. - if you suffer from impaired renal function. In this case, you must not exceed the stated minimum dosage of one capsule per day. - if you suffer from severe impaired renal function and are on dialysis: You should not take more than 50 - 100 mg of vitamin C a day, as this can otherwise lead to high oxalate concentrations in the blood (hyperoxalatemia) and, as a result, to kidney stones (oxalate crystals in the kidneys). In this case, Cetebe Vitamin C Retard 500 is not suitable for you and you should use a lower-dose vitamin C preparation. Active ingredient: ascorbic acid (vitamin C). Areas of application: Prevention of vitamin C deficiency when adequate intake through diet is not ensured. Treatment of vitamin C deficiency diseases. Warning: Contains sucrose (sugar). The American Low Value Shipment Regulatory Modernization Act is active since March 2016 and increases the duty and tax free value of goods American citiziens could import from other countries by mail from $200 to $800 as well as no formal customs procedures are required. The American Low Value Shipment Regulatory Modernization Act is active since March 2016 and increases the duty and tax free value of goods American citiziens could import from other countries by mail from $200 to $800 as well as no formal customs procedures are required