HOW DO U FIND ID50 AND ED50 VALUE OF A DRUG. HOW IT IS USEFUL FOR A DOCTOR

LD50 can find out by acute toxicity in rat or mice and EC 50 can find from efficacy dose of the drug. During acute toxicity study only from range of the dose we can calculate EC50. By LD50 doctore can know the lethal dose of the drug and precaution can be taken during dose given