Pharmacodynamics: Drug effects and mechanisms

Pharmacokinetics: Drug absorption, distribution, metabolism, and excretion

Therapeutic Index: Safety comparison between drug      effectiveness and toxicity.

Drug Interactions: Effects of combining multiple drugs.

Bioavailability: Rate of drug absorption and      availability at the site of action.

Drug metabolism: Body's breakdown and conversion of drugs

Drug development: Testing and approval process for new      medications.

Pharmacogenetics: Genetic impact on drug responses and      effects.

Adverse drug reactions: Unwanted or harmful reactions to medications