India now has two categories of essential drugs, instead of three.

Under the new rule, the number of prescriptions for essential drugs returned to earlier levels, the researchers found.

However, about 30 per cent of the world's population were known to have little or no regular access to essential drugs.

In 1989 legislation made effective a list of essential drugs.

However, the section on essential drugs was later amended.

Some essential drugs are offered free of charge in these hospitals.

A national list of essential drugs was established and implemented in all public sector institutions.

Model List of essential drugs - updated every two years.

Some essential drugs are especially costly in the United States.

These diseases can be eradicated through access to essential drugs.