2017 marked the 40th anniversary of the WHO Model List of Essential Medicines.
A skeletal model of the chemical structure of aspirin
Vitamin D2 supplements
A skeletal model of the chemical structure of albendazole
Pure crystals of ethambutol
Two capsules of atazanavir
Bag containing one unit of fresh frozen plasma
A vial of oral cholera vaccine

It is on the World Health Organization's List of Essential Medicines.

- Ergocalciferol

Ergocalciferol

- WHO Model List of Essential Medicines
2017 marked the 40th anniversary of the WHO Model List of Essential Medicines.

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Cholecalciferol

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Type of vitamin D that is made by the skin when exposed to sunlight; it is found in some foods and can be taken as a dietary supplement.

Type of vitamin D that is made by the skin when exposed to sunlight; it is found in some foods and can be taken as a dietary supplement.

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It is on the World Health Organization's List of Essential Medicines.

There are conflicting reports concerning the relative effectiveness of cholecalciferol (D3) versus ergocalciferol (D2), with some studies suggesting less efficacy of D2, and others showing no difference.