Why one should not take aspirin on empty-stomach?

What is the name of the alkaloid which is specifically used for treatment of malaria fever?

What is an alkaloid? Give one example of drug which belongs to alkaloid group.

Why is paracetamol preferred to aspirin?

What type of drug is used in curing infectious diseases?

Name one estrogen which forms a part of an oral contraceptive.

What is the difference between a preservative and an antioxidant?

Name a drug used in case of mental depression.

What is the name given to medicines used for getting relief from pain?

Give the structure of an alkyl benzene sulphonate detergent.