Vitamin A Chewable Tablet
Vitamin A Chewable Tablet (50,000 IU) — high-dose retinyl-palmitate supplement for vitamin-A deficiency, xerophthalmia and night blindness. Pregnancy: teratogenic — avoid.
✓ Medisch beoordeeld door Morgan Ellis — Apotheekonderzoeker · 8 jaar ervaring · Laatst beoordeeld: mei 2026
⚡ Quick Answer — What is Vitamin A Chewable Tablet?
Vitamin A Chewable Tablet is a Vitamin A 50,000 IU chewable tablet for vitamin-A-deficiency-related dry eye, night blindness, and dietary supplementation. Used once daily for limited courses. Avoid in pregnancy (high dose vitamin A is teratogenic).
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What is Vitamin A Chewable Tablet?
Vitamin A Chewable Tablet is manufactured by Generic as a chewable Vitamin A 50,000 IU tablet. Vitamin A (retinol) is essential for ocular surface health, photoreceptor function (rhodopsin synthesis), and epithelial integrity throughout the body. Deficiency is the leading cause of preventable childhood blindness in the developing world and a contributing factor in chronic dry eye and night blindness.
Hoe het werkt
Vitamin A is metabolised to 11-cis-retinal, the chromophore in retinal photoreceptors essential for converting light into nerve signals. It is also required for epithelial cell differentiation, including the conjunctival goblet cells that produce tear-film mucin. Deficiency causes night blindness (rhodopsin failure), Bitot’s spots, conjunctival xerosis, corneal xerosis, and ultimately keratomalacia — a sight-threatening corneal melt.
Indicaties
- Vitamin A deficiency — confirmed by serum retinol or clinical features (night blindness, Bitot’s spots)
- Xerophthalmia — vitamin-A-deficiency-related dry eye and corneal disease
- Night blindness due to deficiency (not retinitis pigmentosa or other inherited disorders)
- Post-bariatric surgery deficiency
- Malabsorptiesyndromen (cystic fibrosis, biliary cirrhosis, short-bowel syndrome)
- Measles in children in endemic regions (WHO recommendation)
Dosering
Adults: 50,000–200,000 IU once daily for limited deficiency-correction courses (typically 1–2 weeks), then maintenance 5,000–10,000 IU daily. Children: weight-based dosing under paediatric supervision. Always under medical guidance — chronic high doses cause hypervitaminosis A.
Bijwerkingen
At therapeutic doses: generally well tolerated.
Hypervitaminosis A (chronic high-dose): headache, nausea, blurred vision, dry skin, cracked lips, alopecia, bone pain, hepatotoxicity, raised intracranial pressure (pseudotumor cerebri).
Acute toxicity: nausea, vomiting, headache, dizziness, blurred vision — usually resolves within 24–48 hours after stopping.
Waarschuwingen & Contra-indicaties
- Zwangerschap — therapeutic-dose vitamin A is teratogenic; avoid
- Hepatic disease — vitamin A is stored in the liver; toxicity worsens with cirrhosis
- Concurrent isotretinoin or other retinoids — additive toxicity
- Hypervitaminosis A — additive risk
- Children — paediatric weight-based dosing only
Opslag
Store at room temperature 15–25°C protected from moisture and light. Keep out of reach of children — high-dose vitamin A can cause acute toxicity in small bodies.
Veelgestelde vragen
Who needs Vitamin A supplementation?
People with confirmed deficiency (serum retinol or clinical features), xerophthalmia, post-bariatric or post-malabsorption patients, and children in endemic deficiency regions. Most healthy adults on a balanced diet do not need high-dose supplements.
Is more vitamin A better for night vision?
Only if you are deficient. Adding vitamin A to normal levels does not improve night vision and chronic excess causes toxicity (headache, hair loss, bone pain, hepatotoxicity).
Can Vitamin A Chewable Tablet be taken in pregnancy?
No — therapeutic-dose vitamin A is teratogenic. Routine prenatal vitamins contain low-dose vitamin A or beta-carotene (a safer precursor). Check the label and discuss any supplement with your obstetrician.
What is xerophthalmia?
The clinical syndrome of vitamin-A-deficiency dry eye — conjunctival xerosis, Bitot’s spots (foamy patches on the conjunctiva), corneal xerosis, and in severe deficiency keratomalacia (corneal melt). Reversible if treated early.
What is the difference between vitamin A and beta-carotene?
Vitamin A (retinol) is the active form; beta-carotene is a plant-based precursor that the body converts to vitamin A as needed. Beta-carotene cannot cause hypervitaminosis A — the body regulates conversion. Beta-carotene supplements are safer in pregnancy and chronic use.
What if I have liver disease?
Vitamin A is stored in the liver. Cirrhosis or any chronic liver disease increases toxicity risk. Routine high-dose supplementation is contraindicated. Mild deficiency can be addressed with dietary measures (orange and dark-green vegetables, dairy, eggs) plus low-dose multivitamins.
Is Vitamin A Chewable Tablet a treatment for retinitis pigmentosa?
Some studies suggest high-dose vitamin A palmitate (15,000 IU/day) may slow progression in adult-onset retinitis pigmentosa, but the evidence is mixed. This is not the same as treating routine night blindness. Discuss with a retinal specialist.
What about smokers?
Beta-carotene supplements (and possibly high-dose vitamin A) have been linked to increased lung cancer risk in smokers (CARET, ATBC trials). Smokers should avoid high-dose vitamin A and beta-carotene.
Can children take Vitamin A Chewable Tablet?
Only under paediatric guidance. Children are particularly susceptible to acute and chronic toxicity. WHO recommends specific doses for measles in children in endemic regions.
What if I take other multivitamins?
Check the total vitamin A content across all your supplements. Most multivitamins contain 2,500–5,000 IU. Adding Vitamin A Chewable Tablet on top can quickly exceed safe upper limits with chronic use.
Andere oogzorgmedicijnen
Klanten die dit product bekijken, overwegen ook deze alternatieven in ons Oogzorg assortiment:
- Restasis Eye Drops (cyclosporine)
- Cyclomune Eye Drop (cyclosporine)
- Just Tears Eye Drop
- Moisol Eye Drop
- Nano Tears Eye Drop
Medische Disclaimer
De informatie op deze pagina is alleen voor educatieve doeleinden en is geen vervanging voor medisch advies van een gekwalificeerde oogarts of optometrist. Oogaandoeningen kunnen snel een bedreiging vormen voor het gezichtsvermogen — plotseling verlies van gezichtsvermogen, hevige pijn of trauma is een oogheelkundig spoedgeval. Raadpleeg altijd een oogzorgprofessional voordat u een behandeling start, stopt of wijzigt.
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| Sterkte | 50.000iu |
|---|---|
| Hoeveelheid | 30 Tabletten, 60 Tabletten, 90 Tabletten, 180 Tabletten |
Vitamin A Chewable Tablet
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