Medicine

Medicine is a substance or intervention used to prevent, diagnose, or treat disease. It includes drugs, vaccines, procedures, and other therapeutic measures.

Pharmacology: The study of how drugs interact with living organisms. It explains how medicines produce effects in the body.
Receptor (biochemistry): A molecule, often a protein, that binds specific signaling substances and triggers or alters cellular responses. Many medicines alter signaling by activating or blocking receptors.
Preventive Medicine: The branch of medicine focused on preventing disease and promoting health. It includes interventions such as vaccination and preventive medication.
Clinical Trial: A research study in which people receive health-related interventions under a planned protocol. Trials test a medicine’s safety and effectiveness before or after approval.
Active Pharmaceutical Ingredient: The substance in a medicine responsible for its intended pharmacological effect. It distinguishes the therapeutic substance from a medicine’s other ingredients.
Enzyme Inhibitor: A substance that reduces or prevents an enzyme’s catalytic activity. Some medicines treat disease by slowing a specific enzyme.
Diagnostic Test: A procedure or measurement used to detect, confirm, or characterize a health condition. Some medical interventions establish a diagnosis rather than treat disease.
Drug Discovery: The process of identifying and developing candidate substances for use as medicines. It begins the long path from biological target to potential treatment.
Dosage Form: The physical form in which a medicine is prepared for administration. Tablets, injections, and creams deliver therapeutic substances in different ways.
Vaccine: A biological preparation that trains the immune system to recognize and respond to a pathogen or target. Vaccines prevent disease by inducing protective immune memory.

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