Scope: This page explains pharmacology concepts and approved-medicine information. It does not replace a clinician, pharmacist, product label, or emergency service.
The pharmacology map
Pharmacology asks how a substance moves through the body and how it interacts with biological systems. Two broad areas help organize the questions:
- Pharmacokinetics: absorption, distribution, metabolism, and excretion, often summarized as ADME.
- Pharmacodynamics: the relationship between a substance and its biological targets, effects, and response over time.
These processes vary between people and can be affected by age, pregnancy, organ function, genetics, other medicines, food, and health conditions. A general explanation cannot determine an individual's appropriate care.
Approved medicines are not defined by a mechanism alone
A regulatory approval usually depends on a defined formulation, route, population, indication, benefit-risk assessment, manufacturing quality, and labeling. A mechanism that appears promising in a laboratory does not by itself establish safety or effectiveness in people.
| Question | Useful evidence | Why it matters |
|---|---|---|
| Does it work for this indication? | Controlled clinical trials and systematic reviews. | Shows benefit under defined conditions. |
| What are the known risks? | Trial safety data, labeling, and post-market surveillance. | Rare or delayed harms may emerge after approval. |
| Who was studied? | Trial inclusion criteria and subgroup analyses. | Results may not generalize to every person. |
| What else is happening? | Interaction studies and medication history. | Other substances and conditions can change risk. |
Medication safety basics
- Use medicines only as directed by a qualified clinician and the approved label.
- Tell a clinician or pharmacist about prescription medicines, over-the-counter products, supplements, and relevant health conditions.
- Do not share prescription medicines or use someone else's medication.
- Ask what to do if a dose is missed, a side effect appears, or another medicine is started.
- Report suspected adverse effects through the reporting system used in your country.
How to read a pharmacology claim
- Check whether the claim concerns an approved medicine, an investigational product, or a non-medical substance.
- Look for the population, indication, route, formulation, and comparison group.
- Separate a biological mechanism from a demonstrated clinical outcome.
- Check whether safety information comes from controlled studies, surveillance, or case reports.
- Use a clinician or pharmacist to interpret personal risk and treatment choices.