Encyclopedia of drugs

From WikiMD's WELLNESSPEDIA

Encyclopedia of drugs is a comprehensive WikiMD resource devoted to drugs, medications, pharmacology, therapeutics, pharmaceutical sciences, and the safe use of medicines in health care. It provides organized access to information about prescription drugs, over-the-counter drugs, biologic drugs, vaccines, antibiotics, hormone therapy, chemotherapy, psychiatric medications, cardiovascular drugs, diabetes medications, pain medications, anesthetics, dermatologic drugs, respiratory drugs, gastrointestinal drugs, neurologic drugs, endocrine drugs, and other therapeutic agents used in modern medicine.

WikiMD's encylopedia includes detailed encyclopedia-style pages on thousands of individual drugs, including their mechanism of action, indications, contraindications, adverse effects, drug interactions, dosage forms, pharmacokinetics, pharmacodynamics, pregnancy category considerations, clinical use, and patient education information.

Overview[edit]

A drug is a chemical substance, biologic agent, or pharmaceutical product used to diagnose, prevent, treat, cure, or relieve symptoms of a disease, disorder, or medical condition. Drugs may act by altering biochemical pathways, modifying cell signaling, affecting enzyme activity, binding to receptors, changing hormone levels, inhibiting microorganisms, suppressing inflammation, modulating the immune system, or replacing deficient substances in the body.

The Encyclopedia of drugs on WikiMD is designed for use by patients, physicians, pharmacists, medical students, nurses, health professionals, researchers, and the general public seeking reliable information about medicines and their therapeutic roles.

Purpose of the encyclopedia[edit]

The purpose of this encyclopedia is to provide:

Scope[edit]

WikiMD's drug encyclopedia covers a wide range of medication-related topics, including:

Organization of drug information[edit]

Each well-developed drug article may include information such as:

Drug name[edit]

A drug page may list the generic name, brand name, chemical name, and common synonyms.

Drug class[edit]

The article identifies the drug class or therapeutic category, such as beta blocker, ACE inhibitor, statin, antibiotic, antidepressant, antipsychotic, opioid, benzodiazepine, GLP-1 receptor agonist, or proton pump inhibitor.

Mechanism of action[edit]

The mechanism of action explains how the drug produces its therapeutic effect at the molecular, cellular, tissue, or organ-system level.

Indications[edit]

Indications describe the diseases or conditions for which the drug is used, such as hypertension, diabetes, asthma, infection, depression, epilepsy, cancer, obesity, pain, or heart failure.

Contraindications[edit]

Contraindications identify situations in which the drug should not be used because the risk may outweigh the benefit.

Warnings and precautions[edit]

Warnings may include risks related to pregnancy, breastfeeding, kidney disease, liver disease, heart disease, allergy, drug interactions, elderly care, or pediatric use.

Adverse effects[edit]

Adverse effects include unwanted reactions, ranging from mild nausea, headache, or dizziness to serious effects such as anaphylaxis, hepatotoxicity, renal failure, arrhythmia, bleeding, seizure, or respiratory depression.

Drug interactions[edit]

Drug interactions occur when one medication alters the effect, metabolism, safety, or concentration of another drug, food, supplement, or herbal medicine.

Pharmacokinetics[edit]

Pharmacokinetics describes absorption, distribution, metabolism, and excretion, often abbreviated as ADME.

Pharmacodynamics[edit]

Pharmacodynamics describes what the drug does to the body, including receptor binding, dose-response relationship, potency, efficacy, and physiologic effects.

Dosage forms[edit]

Drugs may be available as tablets, capsules, oral solutions, injections, infusions, creams, ointments, transdermal patches, inhalers, suppositories, or implants.

Major drug classes[edit]

Cardiovascular drugs[edit]

Cardiovascular drugs are used to treat disorders of the heart, blood vessels, and circulatory system.

Common classes include:

These medications are used in conditions such as hypertension, heart failure, angina, myocardial infarction, stroke prevention, hyperlipidemia, and coronary artery disease.

Antibiotics and antimicrobial drugs[edit]

Antibiotics and antimicrobial agents treat bacterial infections and other infections caused by microorganisms.

Important groups include:

Antimicrobial therapy requires attention to antibiotic resistance, microbiology, culture and sensitivity, renal dosing, allergy, and drug interactions.

Pain medications and anti-inflammatory drugs[edit]

Analgesics are drugs used to relieve pain.

Major types include:

Pain medicines must be used carefully because of risks such as gastrointestinal bleeding, renal injury, hepatotoxicity, sedation, respiratory depression, dependence, addiction, and overdose.

Psychiatric and neurologic drugs[edit]

Psychiatric medications and neurologic medications affect the brain, neurons, neurotransmitters, and central nervous system.

Classes include:

These drugs are used in depression, anxiety, bipolar disorder, psychosis, epilepsy, Parkinson's disease, migraine, insomnia, narcolepsy, and attention deficit hyperactivity disorder.

Endocrine and metabolic drugs[edit]

Endocrine drugs affect hormone systems, metabolism, glucose, thyroid function, reproductive health, and calcium regulation.

Important examples include:

These medications are relevant to diabetes, type 1 diabetes, type 2 diabetes, hypothyroidism, hyperthyroidism, Addison's disease, Cushing's syndrome, menopause, infertility, obesity, and metabolic syndrome.

Gastrointestinal drugs[edit]

Gastrointestinal drugs are used for diseases of the stomach, small intestine, large intestine, liver, pancreas, and gastrointestinal tract.

Examples include:

Respiratory drugs[edit]

Respiratory system medications are used for asthma, chronic obstructive pulmonary disease, cough, allergy, bronchitis, and other conditions involving the lungs and airways.

Examples include:

Cancer drugs[edit]

Cancer drugs are used in oncology to treat neoplasms and malignancy.

Types include:

Examples appearing in WikiMD include bicalutamide, diethylstilbestrol, ethinylestradiol/cyproterone acetate, cyclophosphamide, and other anticancer or hormone-related therapies.

Dermatologic drugs[edit]

Dermatology medications treat skin conditions, infections, inflammation, acne, psoriasis, rosacea, morphea, warts, and contact dermatitis.

Examples include:

Anesthetic and emergency drugs[edit]

Drugs used in anesthesia, emergency medicine, and intensive care medicine include:

Commonly referenced drug pages on WikiMD[edit]

WikiMD includes many detailed pages on individual medications and drug groups, including:



Pharmacology[edit]

Pharmacology is the study of how drugs interact with living systems. It includes the study of drug absorption, drug distribution, drug metabolism, drug excretion, dose-response relationships, receptors, enzymes, toxicology, and clinical pharmacology.

Pharmacokinetics[edit]

Pharmacokinetics explains how the body handles a drug:

Pharmacodynamics[edit]

Pharmacodynamics explains how a drug affects the body. It includes:

Therapeutic uses[edit]

Drugs may be used for:

Indications and off-label use[edit]

An indication is an approved or accepted reason to use a drug. Some medications may also be used off-label when a physician determines that available evidence supports use for a condition not specifically listed in regulatory labeling.

Off-label use requires careful clinical judgment, review of evidence, and consideration of risk-benefit analysis.

Contraindications and precautions[edit]

A contraindication is a condition in which a drug should not be used. Contraindications may be absolute or relative.

Common contraindication considerations include:

Adverse effects and drug safety[edit]

Every medication has potential benefits and risks. Common adverse effect categories include:

Drug interactions[edit]

Drug interactions may occur through:

Patients should inform their physician and pharmacist about all prescription drugs, over-the-counter drugs, vitamins, supplements, and herbal medicine products they use.

Special populations[edit]

Pregnancy and breastfeeding[edit]

Drug use during pregnancy and breastfeeding requires careful evaluation of maternal benefit, fetal risk, infant exposure, and available alternatives.

Children[edit]

Pediatric dosing often depends on body weight, age, organ maturity, and formulation.

Older adults[edit]

Older adults may be more sensitive to medications because of altered kidney function, liver metabolism, polypharmacy, cognitive impairment, fall risk, and drug interactions.

Kidney disease[edit]

Many drugs require dose adjustment in kidney disease because reduced clearance can increase toxicity.

Liver disease[edit]

Liver disease may alter drug metabolism, protein binding, and bleeding risk.

Medication errors and patient safety[edit]

Medication safety is a major part of patient safety. Errors may occur during prescribing, dispensing, administration, monitoring, or patient use.

Common safety practices include:

  • Confirming the correct patient
  • Reviewing allergies
  • Checking dose and route
  • Reviewing drug interactions
  • Avoiding duplicate therapy
  • Monitoring laboratory values
  • Educating patients about warning signs
  • Maintaining an updated medication list

Drug development and regulation[edit]

The development of a drug may involve:

Drug safety continues to be monitored after approval because rare adverse effects may only appear when a medication is used by large populations.

Generic and brand-name drugs[edit]

A generic drug contains the same active ingredient as a brand-name drug and is intended to be comparable in quality, strength, dosage form, route of administration, and therapeutic effect.

Brand-name drugs may differ from generic versions in inactive ingredients, appearance, packaging, or manufacturer, but approved generic medications must meet regulatory standards for equivalence.

Biologic drugs and biosimilars[edit]

Biologic drugs are complex products derived from living systems. Examples include monoclonal antibodies, vaccines, insulin products, enzyme replacement therapy, and some cancer therapies.

Biosimilars are highly similar to already approved biologic products and are evaluated for safety, purity, and potency.

Drug information resources on WikiMD[edit]

WikiMD connects drug pages with related encyclopedia content, including:

Using WikiMD drug pages[edit]

WikiMD drug pages are intended to support health education and should be used as an informational resource. They are not a substitute for professional medical judgment.

Users should consult a qualified physician, pharmacist, or other licensed health professional before starting, stopping, or changing any medication.

See also[edit]

Drug groups | Encyclopedia | Dictionary | Cancer drugs | OTC | Alternative meds | Drugs | Medications A-Z | FDA approved products | Portal:Pharmacology

Major chemical drug groups
Gastrointestinal tract/
metabolism (A)
Blood and blood
forming organs (B)
Cardiovascular
system (C)
Skin (D)
Genitourinary
system (G)


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