RRB Pharmacist Recruitment Exam cheat sheet

Pharmacokinetics (ADME): absorption, distribution, metabolism (mainly hepatic CYP450), excretion (mainly renal); bioavailability of IV route is 100% by definition.

Zero-order elimination: constant amount eliminated per unit time, half-life is not constant (e.g. ethanol, phenytoin at high dose, aspirin at high dose); first-order: constant fraction, half-life constant.

Half-life rule: after ~4–5 half-lives about 94–97% of steady state is reached; loading dose = (Vd × target concentration)/bioavailability.

Receptor families: ligand-gated ion channels (nicotinic, GABA-A) act in milliseconds; G-protein coupled receptors (muscarinic, adrenergic) act in seconds; nuclear receptors (steroid, thyroid) act in hours to days.

Competitive antagonist shifts agonist dose-response curve right with no change in Emax; non-competitive antagonist lowers Emax; partial agonist has reduced intrinsic activity.

Organophosphate poisoning: irreversible acetylcholinesterase inhibition; muscarinic effects (SLUDGE, bradycardia, miosis) treated with atropine; nicotinic effects with pralidoxime early.

Autacoid and drug antidotes: opioid overdose-naloxone; benzodiazepine-flumazenil; warfarin-vitamin K1; heparin-protamine sulfate; paracetamol-N-acetylcysteine; methanol-fomepizole/ethanol.

Therapeutic index = TD50/ED50; low-index drugs (digoxin, lithium, warfarin, phenytoin, aminoglycosides) need therapeutic drug monitoring.

Bioavailability ranking of oral solid forms: solution > suspension > capsule > tablet > coated tablet; smaller particle size and higher aqueous solubility increase dissolution rate (Noyes–Whitney).

Tablet excipients: diluent (lactose, MCC), binder (PVP, starch paste), disintegrant (croscarmellose, sodium starch glycolate), glidant (colloidal silica), lubricant (magnesium stearate).

Suppository base: cocoa butter (theobroma oil) has melting point ~30–36 °C, is polymorphic, and requires no more than 10% added solids to avoid melting-point depression; PEG bases are water-soluble alternatives.

Ointment bases: hydrocarbon (white petrolatum), absorption (wool fat), water-removable/emulsion (hydrophilic ointment), water-soluble (PEG ointment).

Suspension quality: sedimentation volume F = Vu/Vo; flocculated suspensions settle fast but redisperse easily; deflocculated settle slowly but form hard cake.

Sterile product standards: terminally sterilized aqueous injections require SAL 10^-6; eye drops are sterile but not required to be pyrogen-free; ophthalmic solutions are usually isotonic (0.9% NaCl equivalent).

Prescription abbreviations: b.d. twice daily, t.d.s. thrice daily, q.i.d. four times daily, h.s. at bedtime, p.c. after food, a.c. before food, p.r.n. when required, stat immediately, gtt drops.

Dispensing rule: always check dose, strength, route, and expiry; label with patient name, drug, strength, directions, date, and storage; record controlled drugs in the statutory register.

Inorganic official compounds: sodium chloride 0.9% is isotonic; boric acid is bacteriostatic/weak antiseptic; potassium permanganate (KMnO4) is an oxidizing antiseptic used as 1:5000–1:10000 solution.

Antacids: sodium bicarbonate liberates CO2 and causes systemic alkalosis; aluminium hydroxide causes constipation; magnesium hydroxide causes diarrhea-combined to balance bowel effects.

Organic functional-group tests: alcohols with Lucas reagent (ZnCl2/HCl); aldehydes with Tollens and Fehling; ketones with 2,4-DNP; carboxylic acids with NaHCO3 (CO2 effervescence); phenols with FeCl3.

Stereochemistry: enantiomers differ in optical rotation and biological activity; thalidomide illustrates enantiomer-specific teratogenicity; racemic mixture has zero net rotation.

Medicinal chemistry SAR: para-aminobenzoic acid is essential for sulfonamide action-substitution at the para-amino group abolishes activity; sulfonamides inhibit dihydropteroate synthase.

Prodrugs are inactive forms activated in vivo: enalapril to enalaprilat, aspirin (acetylsalicylic acid) acts by acetylating cyclooxygenase, levodopa crosses BBB and is decarboxylated to dopamine.

Bioisosterism replaces a group with similar size/electronic properties (e.g. –OH with –NH2, –S– with –O–) to retain activity while altering metabolism or toxicity.

Henderson–Hasselbalch: pH = pKa + log([A-]/[HA]); weak acids are more ionized and less lipid-soluble at high pH, affecting absorption and renal reabsorption.

Alkaloid-bearing drugs: morphine and codeine from Papaver somniferum; quinine/quinidine from Cinchona bark; atropine/hyoscine from Atropa belladonna and Datura; reserpine from Rauwolfia serpentina; vinca alkaloids from Catharanthus roseus.

Glycoside drugs: digoxin/digitoxin from Digitalis purpurea/lanata (cardiac glycosides); sennosides from senna (anthraquinone purgatives); glycyrrhizin from liquorice.

Volatile-oil drugs: clove (eugenol), peppermint (menthol), eucalyptus (cineole), cinnamon (cinnamaldehyde); stored in well-closed containers away from heat because oils are volatile and oxidizable.

Gums and mucilages: acacia (emulsifier), tragacanth (suspending agent), isapghula/plantago (bulk laxative); agar and sodium alginate from algae are used as suspending/disintegrating agents.

Resins: asafoetida, colophony, podophyllum; ginger and turmeric are rhizomes; fennel, coriander, and cumin are fruits (cremocarps) used as carminatives.

Chemical tests: alkaloids with Dragendorff (orange-red) and Mayer (cream) reagents; tannins with ferric chloride (blue-black); saponins produce persistent froth and hemolyze red cells.

Cultivation and collection: cultivation gives uniform quality and higher yield; wild collection risks adulteration and species confusion; drying must be rapid to prevent enzymatic degradation and mold.

Adulteration types: substitution with inferior species, exhausted drug, artificially colored material, and admixture with foreign matter-detected by organoleptic, microscopic, and chemical assay.

Patient counseling: confirm patient understanding by teach-back; explain dose, timing, food interactions, missed doses, and storage; document in the patient record.

Prescription legality: must include prescriber name, registration number, date, patient details, drug, strength, dosage form, and directions; Schedule H drugs require a valid prescription and 'Rx' label.

Adverse drug reaction reporting: report serious and unexpected reactions to the national pharmacovigilance programme using the suspected ADR reporting form; causality assessed by WHO-UMC scale or Naranjo score.

Medication error prevention: read labels twice, avoid abbreviations, use leading-zero notation (0.5 not .5), confirm pediatric doses by weight, and separate look-alike/sound-alike drugs.

Drug interactions: warfarin plus NSAIDs raises bleeding risk; MAO inhibitors with tyramine-rich food cause hypertensive crisis; tetracyclines and fluoroquinolones chelate with antacids and milk.

Community pharmacy stock control: FIFO/FEFO rotation, temperature monitoring of the refrigerator (2–8 °C), cold-chain for vaccines, and segregated storage of narcotics under double lock.

Patient adherence: pill organizers, simplified regimens, reminder charts, and addressing cost; adherence improves with clear explanation of purpose and expected adverse effects.

OTC versus prescription: OTC products are safe for self-medication with adequate labeling; Schedule H, H1, and X drugs require prescription, with Schedule X needing retention of the prescription.

Hospital pharmacy services: drug distribution (unit dose, floor stock, ward stock), drug information center, therapeutic drug monitoring, and sterile compounding under laminar airflow.

PTC (Pharmacy and Therapeutics Committee) functions: formulary preparation, drug-use evaluation, adverse drug reaction review, and antibiotic policy; it is advisory to the medical staff.

Clinical laboratory values: normal serum sodium 135–145 mEq/L, potassium 3.5–5.0 mEq/L, fasting glucose 70–100 mg/dL, creatinine 0.6–1.2 mg/dL, hemoglobin 13–17 g/dL (male).

Renal dose adjustment: estimate creatinine clearance by Cockcroft–Gault; reduce dose or extend interval for drugs cleared renally (aminoglycosides, vancomycin, digoxin) in renal impairment.

Hepatic impairment: avoid or reduce drugs with high first-pass metabolism; monitor INR for warfarin; paracetamol dose limited to reduce hepatotoxic risk.

Total parenteral nutrition: calculate calories from dextrose (3.4 kcal/g) and amino acids (4 kcal/g), add electrolytes, vitamins, and trace elements; check for compatibility before mixing.

Drug-induced adverse effects: aminoglycosides-ototoxicity and nephrotoxicity; vancomycin-'red man' infusion reaction; NSAIDs-gastric ulcer and renal impairment; corticosteroids-hyperglycemia and infection.

Therapeutic drug monitoring: sample timing matters-trough levels for vancomycin and aminoglycosides, and steady state after 4–5 half-lives; interpret with clinical status, not numbers alone.

Drugs and Cosmetics Act, 1940 and Rules, 1945: Schedule H (prescription drugs), Schedule H1 (antibiotics, anti-TB, some sedatives; register maintained 3 years), Schedule X (narcotics/psychotropics; prescription retained), Schedule M (GMP), Schedule Y (clinical trials).

Pharmacy Act, 1948: establishes the Pharmacy Council of India and State Pharmacy Councils; registration is required to practice as a pharmacist; PCI regulates pharmacy education standards.

Drug price control: the National Pharmaceutical Pricing Authority fixes ceilings under the Drugs (Prices Control) Order; essential medicines are listed in the National List of Essential Medicines.

Narcotic Drugs and Psychotropic Substances Act, 1985: controls manufacture, sale, and possession; records and licenses are mandatory for narcotics; violations carry criminal liability.

Advertising and labeling: Drugs and Magic Remedies (Objectionable Advertisements) Act, 1954 prohibits claims of curing specified diseases; labels must state batch number, manufacturing and expiry dates, and 'Schedule H' warning.

Pharmacy ethics: maintain patient confidentiality, dispense only against valid prescription, do not substitute without consent, avoid self-medication advice beyond scope, and report ADRs honestly.

Inspectors and sampling: drug inspectors can take samples for testing; a sample is declared not of standard quality if it fails pharmacopoeial specifications; appeals lie to the Central Drugs Laboratory.

Record retention: prescription records, Schedule H1 register, and narcotic registers must be kept for the statutory period (commonly 3 years for Schedule H1); maintain batch-wise distribution records for recalls.

Blood pressure regulation: cardiac output × peripheral resistance; baroreceptors in the carotid sinus and aortic arch sense stretch and adjust sympathetic tone via the medulla.

Nephron function: glomerular filtration in the glomerulus, reabsorption of glucose and amino acids in the proximal tubule, and concentration in the loop of Henle; aldosterone increases sodium reabsorption.

Cardiac cycle: P wave-atrial depolarization; QRS-ventricular depolarization; T wave-ventricular repolarization; normal PR interval 0.12–0.20 s and QRS <0.12 s.

Respiratory physiology: tidal volume ~500 mL, vital capacity ~4800 mL in adults; oxygen carried mostly by hemoglobin, CO2 mainly as bicarbonate; surfactant from type II pneumocytes reduces surface tension.

Endocrine axes: hypothalamus releases releasing hormones, anterior pituitary releases trophic hormones, and target glands secrete effectors; negative feedback is the default control mechanism.

Pathophysiology of diabetes: type 1 is insulin deficiency from beta-cell destruction; type 2 is insulin resistance with relative deficiency; HbA1c reflects 2–3 months of glycemic control.

Inflammation: acute response shows vasodilation, increased permeability, and neutrophil infiltration; chronic inflammation shows lymphocytes, macrophages, and fibrosis.

Liver function: synthesizes albumin and clotting factors, conjugates bilirubin, and metabolizes drugs; jaundice results from prehepatic, hepatic, or posthepatic causes.

Glycolysis yields net 2 ATP and 2 NADH per glucose; the citric acid cycle and oxidative phosphorylation yield most ATP, about 30–32 ATP per glucose overall.

Enzyme kinetics: Michaelis–Menten Km is the substrate concentration at half Vmax; a low Km means high affinity; competitive inhibitors raise apparent Km without changing Vmax.

Carbohydrate metabolism: insulin lowers blood glucose by promoting uptake and glycogen synthesis; glucagon and adrenaline raise glucose by glycogenolysis and gluconeogenesis.

Lipid profile: total cholesterol, LDL, HDL, triglycerides; LDL is atherogenic, HDL is protective; statins inhibit HMG-CoA reductase, the rate-limiting step of cholesterol synthesis.

Liver function tests: raised ALT/AST indicate hepatocellular injury; raised alkaline phosphatase and bilirubin suggest cholestasis; low albumin and prolonged prothrombin time indicate synthetic failure.

Renal function tests: raised blood urea and creatinine indicate reduced GFR; urine albumin is an early marker of diabetic nephropathy; normal urine is sterile and protein-free.

Clinical pathology: anemia classified by MCV (microcytic-iron deficiency; macrocytic-B12/folate deficiency; normocytic-chronic disease); ESR and CRP are nonspecific inflammation markers.

Acid–base: normal arterial pH 7.35–7.45; metabolic acidosis shows low bicarbonate with compensatory hyperventilation (low PaCO2); anion gap = Na − (Cl + HCO3).

Autoclaving: moist heat at 121 °C, 15 psi, 15–20 minutes; effective against spores; used for culture media, surgical instruments, and heat-stable fluids; monitor with biological indicator Geobacillus stearothermophilus.

Dry heat: hot-air oven at 160 °C for 2 hours or 170 °C for 1 hour; used for glassware, oils, and powders; biological indicator Bacillus atrophaeus.

Ethylene oxide sterilization is used for heat-sensitive items such as plastic devices and catheters; it requires adequate aeration to remove toxic residues.

Disinfectants: 70% alcohol is more effective than 95% because water aids protein denaturation; sodium hypochlorite is a broad-spectrum oxidizing disinfectant; glutaraldehyde is a high-level disinfectant for endoscopes.

Membrane filtration (0.22 µm) sterilizes heat-labile solutions such as vitamins and antibiotics; it removes bacteria but not viruses or mycoplasma reliably.

Gram stain: Gram-positive cells retain crystal violet (thick peptidoglycan) and appear purple; Gram-negative cells decolorize and take the safranin counterstain, appearing pink.

Sterility testing: direct inoculation and membrane filtration methods; media are incubated at 30–35 °C for bacteria and 20–25 °C for fungi; positive controls validate the test.

Universal precautions: hand hygiene is the single most effective measure; PPE, sharps disposal in puncture-resistant containers, and safe injection practices prevent blood-borne transmission.

Indian Constitution: adopted 26 November 1949, came into force 26 January 1950; it is the longest written constitution; Dr B. R. Ambedkar chaired the Drafting Committee.

Fundamental Rights (Part III) include equality, freedom, protection against exploitation, religion, cultural and educational rights, and constitutional remedies (Article 32).

Parliament: Lok Sabha and Rajya Sabha plus the President; money bills originate only in the Lok Sabha; the Rajya Sabha cannot amend a money bill.

Indian Railways: national carrier, one of the largest rail networks; zones are headed by General Managers; the Railway Board functions under the Ministry of Railways.

Railway recruitment: selection for posts such as pharmacist is through computer-based tests, document verification, and medical examination under the Railway Recruitment Board.

National health programmes: National Health Mission, Ayushman Bharat (PM-JAY), and the National Immunization Schedule; the National Pharmaceutical Pricing Authority regulates medicine prices.

Indian geography and polity facts: 28 states and 8 union territories; the President is the constitutional head, and the Prime Minister heads the Council of Ministers.

Current affairs for exams: track national health policy updates, drug regulatory circulars from CDSCO, and railway budget announcements for pharmacy and medical posts.

Number series: check differences, ratios, squares/cubes, and alternating patterns; a common pattern is +2, +4, +6 or ×2, ×3, ×4.

Coding–decoding: letter positions A=1 to Z=26; reverse alphabet position = 27 − position; shift rules apply uniformly to all letters unless stated otherwise.

Blood relations: draw a family tree using standard symbols; 'maternal uncle' is mother's brother; 'paternal aunt' is father's sister; do not assume gender from names.

Direction sense: draw a compass with N up; net displacement uses Pythagoras for perpendicular moves; left/right turns reverse when facing south.

Syllogism: Venn diagrams decide validity; 'all A are B' does not imply 'all B are A'; 'some A are B' implies 'some B are A'.

Seating arrangement: fix one anchor person, then place others clockwise or anticlockwise; for linear arrangements, note whether facing north or south to interpret left/right.

Odd-one-out: compare category, number of letters, vowel/consonant pattern, or mathematical property; the basis must apply to all but one option.

Data interpretation: compute percentages as (part/whole)×100; average = sum/count; verify options by approximation before exact calculation.

SI units: force in newton, pressure in pascal, energy in joule, power in watt, electric current in ampere, temperature in kelvin; 1 atm ≈ 101.3 kPa.

Newton's laws: F = ma; an object remains at rest or in uniform motion unless acted on by a net force; every action has an equal and opposite reaction.

Electricity: Ohm's law V = IR; power P = VI = I²R; series resistance adds, parallel resistance satisfies 1/R = 1/R1 + 1/R2.

Chemistry basics: pH below 7 is acidic, above 7 is basic; acids turn blue litmus red; neutralization forms salt and water; Avogadro number is 6.022 × 10^23.

Periodic trends: atomic radius decreases across a period and increases down a group; electronegativity increases across a period and decreases down a group.

Biology basics: the cell is the structural and functional unit of life; mitochondria are the powerhouse; chlorophyll-containing chloroplasts perform photosynthesis.

Human body: the heart has four chambers; the lungs exchange gases in alveoli; the kidney filters blood in nephrons; blood groups follow the ABO and Rh systems.

Scientific instruments: barometer measures pressure, hygrometer measures humidity, sphygmomanometer measures blood pressure, and a spectrometer measures light spectra.

Percentage change = (new − old)/old × 100; successive percentage changes of a% and b% give net change a + b + ab/100.

Profit and loss: profit% = profit/CP × 100; selling price = CP × (100 + profit%)/100; discount is calculated on marked price.

Simple interest = P × R × T/100; compound interest amount = P(1 + R/100)^T; CI exceeds SI for T > 1 year.

Time, speed, distance: distance = speed × time; average speed for equal distances = 2xy/(x + y), not the arithmetic mean of speeds.

Ratio and proportion: if a:b = c:d then ad = bc; divide a quantity in ratio m:n by parts m/(m+n) and n/(m+n).

Time and work: if A finishes in x days, A's one-day work is 1/x; combined rate is the sum of individual rates; work done = rate × time.

Averages: average = sum/count; if each value increases by k, the average increases by k; weighted average uses weights proportional to group sizes.

Mensuration: area of circle πr², circumference 2πr; volume of cylinder πr²h; total surface area of cube 6a²; use π ≈ 22/7 for quick calculation.

Computer generations: first-vacuum tubes; second-transistors; third-integrated circuits; fourth-microprocessors; fifth-artificial intelligence concepts.

Memory hierarchy: registers fastest, then cache, RAM, and secondary storage; RAM is volatile, ROM is non-volatile; 1 KB = 1024 bytes, 1 MB = 1024 KB.

Input/output devices: keyboard, mouse, and scanner are input; monitor, printer, and speaker are output; touchscreens are both.

Software types: system software (operating system, device drivers) versus application software (word processor, spreadsheet); MS Excel uses formulas starting with '='.

Networking: LAN covers a small area, WAN a large area; IP address identifies a device; HTTP is the web protocol, and email uses SMTP for sending and POP3/IMAP for receiving.

Computer security: antivirus software, strong passwords, firewalls, and regular backups; phishing is a fraudulent attempt to obtain credentials via deceptive messages.

File operations: extensions identify file type (.docx, .xlsx, .pdf, .jpg); 'Save As' creates a new copy; 'Cut' moves and 'Copy' duplicates to the clipboard.

Shortcut keys: Ctrl+C copy, Ctrl+V paste, Ctrl+X cut, Ctrl+Z undo, Ctrl+S save, Ctrl+P print, Alt+Tab switch applications.