Topic: Introduction to Pharmacy, Pharmacy Profession and Basic Terminology
Exam: RRB Pharmacist (Entry Grade)
Study time: 30–40 minutes
Revision level: Quick, exam-oriented notes
1. What Is Pharmacy?
Pharmacy is the branch of health sciences concerned with the preparation, formulation, dispensing, proper use and safe handling of medicines.
Pharmaceutical sciences include the study of drugs, their properties, formulation, analysis, effects and uses.
Important Definitions
- Pharmacy: Science and practice concerned with medicines and their appropriate use.
- Pharmacist: A qualified and registered professional authorized to practise pharmacy according to applicable law.
- Drug: A substance used for the diagnosis, prevention, treatment or relief of disease, or to modify physiological functions.
- Medicine: A substance or formulation used to prevent, diagnose or treat disease.
- Pharmaceutical product: A product prepared and presented for pharmaceutical or therapeutic use.
- Pharmaceutics: Science of converting drugs into suitable dosage forms.
- Pharmacology: Study of drugs and their effects on living organisms.
- Pharmacognosy: Study of crude drugs obtained from natural sources.
- Pharmaceutical Chemistry: Study of the chemical properties, synthesis, analysis and medicinal applications of drugs.
- Pharmacotherapy: Treatment of disease using medicines.
- Toxicology: Study of the harmful effects of chemicals and drugs.
- Posology: Study of drug doses.
- Pharmacokinetics: Study of what the body does to a drug.
- Pharmacodynamics: Study of what a drug does to the body.
- Pharmacovigilance: Science and activities relating to the detection, assessment, understanding and prevention of adverse effects and other medicine-related problems.
Exam tip: Learn the difference between pharmacokinetics and pharmacodynamics. These are fundamental pharmacy concepts.
2. Major Branches of Pharmacy
| Branch | Main focus |
|---|---|
| Pharmaceutics | Formulation and dosage forms |
| Pharmacology | Drug actions and effects |
| Pharmacognosy | Natural drugs |
| Pharmaceutical Chemistry | Drug chemistry and analysis |
| Pharmacotherapy | Medicines used to treat diseases |
| Toxicology | Harmful effects of substances |
| Clinical Pharmacy | Optimizing medicine use in individual patients |
| Hospital Pharmacy | Medicine management in hospitals |
| Community Pharmacy | Pharmacy services in the community |
| Industrial Pharmacy | Large-scale manufacturing of medicines |
| Pharmaceutical Biotechnology | Application of biotechnology to pharmaceutical products |
| Pharmaceutical Analysis | Identification, testing and quantification of substances |
| Pharmaceutical Jurisprudence | Laws and regulations governing pharmacy and medicines |
| Pharmacovigilance | Monitoring medicine safety |
Quick revision:
Natural drugs → Pharmacognosy
Drug action → Pharmacology
Dosage-form preparation → Pharmaceutics
Drug dose → Posology
Drug safety monitoring → Pharmacovigilance
3. The Pharmacy Profession in India
Pharmacy is an important part of the healthcare system. Pharmacists help ensure that medicines are supplied, stored, dispensed and used safely.
Major Responsibilities of a Pharmacist
- Dispensing medicines according to valid prescriptions and applicable law.
- Checking prescriptions for completeness and potential problems.
- Providing information about dosage, administration and storage.
- Counselling patients on appropriate medicine use.
- Identifying and helping prevent medication errors.
- Monitoring and reporting suspected adverse drug reactions.
- Maintaining medicine inventory and proper storage conditions.
- Supporting rational use of medicines.
- Following applicable pharmacy laws and professional ethics.
- Coordinating with doctors, nurses and other healthcare professionals.
Major Career Areas
- Community or retail pharmacy
- Hospital pharmacy
- Clinical pharmacy
- Pharmaceutical manufacturing
- Quality control and quality assurance
- Pharmaceutical research and development
- Regulatory affairs
- Pharmacovigilance
- Pharmaceutical marketing
- Government pharmacist services
Remember: A pharmacist’s role is not limited to handing over medicines. It also includes medicine safety, patient counselling and the appropriate use of medicines.
4. Important Pharmacy Organizations in India
These organizations and their functions are useful for competitive-exam revision.
| Organization | Important function |
|---|---|
| Pharmacy Council of India (PCI) | Regulates pharmacy education and the profession within its statutory framework |
| State Pharmacy Council | Registration of pharmacists and related statutory functions under applicable law |
| Indian Pharmacopoeia Commission (IPC) | Publishes and maintains the Indian Pharmacopoeia; supports medicine quality standards and pharmacovigilance activities |
| Central Drugs Standard Control Organisation (CDSCO) | India’s central drug regulatory authority |
| Ministry of Health and Family Welfare | Central ministry responsible for health-related policy and administration |
| World Health Organization (WHO) | International public health organization |
| International Pharmaceutical Federation (FIP) | International organization representing pharmacy and pharmaceutical sciences |
Important Indian Pharmacy Facts
- Pharmacy Act: Enacted in 1948.
- Drugs and Cosmetics Act: Enacted in 1940.
- Indian Pharmacopoeia: Official Indian publication of drug standards.
- PCI: Pharmacy Council of India.
- IPC: Indian Pharmacopoeia Commission.
- CDSCO: Central Drugs Standard Control Organisation.
Exam trap: PCI and IPC are different organizations. PCI deals with pharmacy education and professional regulation within its statutory remit, whereas IPC is associated with official drug standards and the Indian Pharmacopoeia.
5. Basic Pharmaceutical Terminology
Learn these short definitions carefully.
A. Drug and Dosage-Form Terms
- Active Pharmaceutical Ingredient (API): Ingredient responsible for the intended pharmacological activity of a medicine.
- Excipient: Ingredient other than the active ingredient included in a formulation to support its manufacture, stability, administration or performance.
- Dosage form: Physical form in which a medicine is administered.
- Tablet: Solid dosage form generally containing a measured quantity of drug with suitable excipients.
- Capsule: Dosage form in which a drug is enclosed in a suitable shell.
- Syrup: Concentrated aqueous preparation containing sugar or a suitable substitute, with or without medicinal substances.
- Suspension: System in which insoluble solid particles are dispersed in a liquid.
- Emulsion: System containing two immiscible liquids, with one dispersed in the other.
- Solution: Homogeneous mixture in which one or more substances are dissolved in a solvent.
- Ointment: Semisolid preparation intended mainly for application to the skin or certain mucous membranes.
B. Medicine-Use Terms
- Indication: A condition or purpose for which a medicine is used.
- Contraindication: A condition or situation in which a medicine or treatment should not be used, or should be avoided according to its risk.
- Side effect: An unintended effect associated with the use of a medicine.
- Adverse Drug Reaction (ADR): A harmful and unintended response to a medicine at doses normally used for prevention, diagnosis, treatment or modification of physiological function.
- Drug interaction: An alteration in the effect of a drug due to another drug, food, supplement or substance.
- Tolerance: Reduced response to a drug after repeated use, potentially requiring a higher dose to produce the same effect.
- Dependence: A state in which the body or mind adapts to repeated substance use; its features depend on the substance.
- Overdose: Administration or use of an excessive amount of a medicine.
- Therapeutic effect: The intended beneficial effect of a medicine.
- Therapeutic dose: Dose intended to produce a desired therapeutic effect.
C. Pharmacokinetic Terms
Pharmacokinetics is commonly summarized as ADME.
| Term | Meaning |
|---|---|
| Absorption | Entry of a drug into the systemic circulation from its administration site |
| Distribution | Movement of a drug between blood and body tissues |
| Metabolism | Chemical transformation of a drug in the body |
| Excretion | Removal of a drug or its metabolites from the body |
| Bioavailability | Fraction of an administered dose reaching systemic circulation unchanged |
| Half-life (t½) | Time required for the drug concentration or amount in the body to decrease by 50% under the specified kinetic conditions |
| Clearance | Volume of plasma or blood cleared of drug per unit time |
| First-pass metabolism | Metabolism before a drug reaches the systemic circulation, commonly in the intestinal wall and liver after oral administration |
Important: Intravenous administration provides 100% absolute bioavailability by definition, assuming the administered dose reaches the systemic circulation.
D. Prescription Terms
- Prescription: An authorized instruction for the preparation, supply or administration of a medicine.
- Dose: Amount of medicine taken or administered at one time.
- Dosage regimen: The dose, frequency, route and duration of treatment.
- Route of administration: Path by which a medicine enters the body.
- Oral route: Administration through the mouth.
- Parenteral route: Administration by injection or infusion, bypassing the gastrointestinal tract.
- Topical route: Application to a body surface for a local or intended systemic effect.
- Sublingual route: Administration under the tongue.
- Inhalation: Administration through the respiratory tract.
Common Prescription Abbreviations
| Abbreviation | Meaning |
|---|---|
| Rx | Prescription symbol |
| PO | By mouth |
| IV | Intravenous |
| IM | Intramuscular |
| SC | Subcutaneous |
| PRN | As needed |
| BID | Twice daily |
| TID | Three times daily |
| QID | Four times daily |
| OD | Once daily in some prescription conventions; can be ambiguous |
| HS | At bedtime in some prescription conventions |
Safety note: Abbreviations can be ambiguous. In actual clinical practice, clear instructions should be preferred, and the intended meaning must be confirmed whenever necessary. Never guess a medicine’s dose or frequency from an unclear prescription.
6. Important Differences for Exams
Pharmacokinetics vs Pharmacodynamics
| Pharmacokinetics | Pharmacodynamics |
|---|---|
| What the body does to the drug | What the drug does to the body |
| Includes ADME | Includes drug effects and mechanisms of action |
| Studies concentration and movement over time | Studies effects in relation to drug concentration or dose |
Side Effect vs Adverse Drug Reaction
| Side effect | Adverse drug reaction |
|---|---|
| An unintended effect of a medicine | A harmful and unintended response to a medicine at normally used doses |
| May be mild or harmful | By definition, harmful and unintended |
| Context determines its significance | May require treatment, dose adjustment or medicine withdrawal |
Drug vs Excipient
| Drug/API | Excipient |
|---|---|
| Provides the intended active effect | Supports formulation, manufacturing, stability or administration |
| Example: paracetamol in a paracetamol tablet | Example: a suitable tablet binder |
Pharmacopoeia vs Formulary
- Pharmacopoeia: Official publication containing standards and requirements for drug substances and pharmaceutical preparations.
- Formulary: Publication containing information about medicines, and sometimes prescribing, preparation or use recommendations, depending on its purpose.
Remember: Indian Pharmacopoeia is commonly abbreviated as IP.
7. Indian Pharmacopoeia: Quick Revision
The Indian Pharmacopoeia establishes official standards for the identity, purity, strength and quality of substances and preparations covered by its monographs.
Key Terms
- Monograph: A standard-setting entry for an individual substance, preparation or other specified item.
- Identity test: Helps establish that the substance is the intended material.
- Purity test: Detects or limits specified impurities.
- Assay: Determines the amount or content of a specified substance.
- Impurity: An unwanted component present in a substance or product.
- Standardization: Establishing and applying specified standards to help ensure consistent quality.
Exam tip: Remember the distinction between an identity test, a purity test and an assay.
8. Rational Use of Medicines
Rational use of medicines means that patients receive medicines appropriate to their clinical needs, in doses that meet their individual requirements, for an adequate period and at a reasonable cost to them and the community.
Principles
- Use the correct medicine for the clinical condition.
- Select an appropriate dose and dosage form.
- Use the correct route and duration.
- Consider contraindications and potential interactions.
- Counsel patients about correct administration.
- Avoid unnecessary antibiotic use.
- Encourage adherence to prescribed treatment.
Important: Antibiotics should not be used for viral infections unless there is a separate, clinically justified indication.
📑 High-Yield One-Liners
Revise these facts before attempting the MCQs.
- Study of drug doses — Posology.
- Study of drug actions — Pharmacology.
- Study of natural crude drugs — Pharmacognosy.
- Science of dosage-form preparation — Pharmaceutics.
- Study of harmful effects of substances — Toxicology.
- Study of what the body does to a drug — Pharmacokinetics.
- Study of what a drug does to the body — Pharmacodynamics.
- ADME stands for — Absorption, Distribution, Metabolism, Excretion.
- Monitoring medicine safety — Pharmacovigilance.
- Active ingredient responsible for the intended pharmacological activity — API.
- Ingredient supporting formulation or manufacture — Excipient.
- Official Indian drug-standards publication — Indian Pharmacopoeia.
- Pharmacy Act — 1948.
- Drugs and Cosmetics Act — 1940.
- Indian Pharmacopoeia Commission — IPC.
- Pharmacy Council of India — PCI.
- Time taken for drug concentration to fall by half — Half-life.
- Drug entering the body through a vein — Intravenous administration.
- Two immiscible liquids, one dispersed in the other — Emulsion.
- Insoluble solid particles dispersed in a liquid — Suspension.