<unk> , as defined by the World Health Organization are "those drugs that satisfy the health care needs of the majority of the population; they should therefore be available at all times in adequate amounts and in appropriate dosage forms, at a price the community can afford."
The WHO has published a model list of<unk> . Each country is encouraged to prepare their own lists taking into consideration local priorities. At present over 150 countries have published an official<unk>  list.The WHO List contains a core list and a complementary list.
The core list presents a list of minimum<unk> needs for a basic health care system, listing the most efficacious, safe and cost-effective<unk>  for priority conditions. Priority conditions are selected on the basis of current and estimated future public health relevance, and potential for safe and cost-effective treatment.
The complementary list presents<unk>  for priority diseases, for which specialized diagnostic or monitoring facilities are needed. In case of doubt<unk>  may also be listed as complementary on the basis of consistent higher costs or less attractive cost-effectiveness in a variety of settings.
The compilation of an<unk>  list enables health authorities, especially in developing countries, to optimize pharmaceutical resources.
Essential medicines
Prescription drug
Mobile health
Medical guideline
Designer drug
Alternative medicine
Food chemistry
Health insurance