Pharmacology diagram showing zero order kinetics vs first order kinetics drug elimination curves, with plasma concentration on y-axis and time on x-axis, clearly labeled with examples of zero order drugs (alcohol, phenytoin, aspirin at high doses) and first order drugs (most drugs). Include the key concept that zero order has constant amount eliminated per unit time while first order has constant fraction eliminated per unit time.

Medical diagram showing organophosphorus poisoning mechanism and treatment. Show acetylcholinesterase enzyme being inhibited by organophosphate compound leading to acetylcholine accumulation. Show muscarinic effects (SLUDGE - Salivation, Lacrimation, Urination, Defecation, GI cramps, Emesis) and nicotinic effects (muscle weakness, fasciculations). Show treatment with Atropine blocking muscarinic receptors and Pralidoxime (2-PAM) reactivating acetylcholinesterase enzyme before aging occurs.

Medical pharmacology diagram of beta blockers and nitrates mechanism in angina pectoris. Show heart with reduced oxygen demand from beta blockers (decreased heart rate, contractility, afterload). Show coronary vessels dilating with nitrates (venodilation reducing preload, arterial dilation). Include text showing how both drugs reduce myocardial oxygen demand and improve supply-demand balance in angina. Clinical diagram style suitable for MBBS exam.

Pharmacology diagram of drug antagonism types: competitive antagonism showing parallel right shift of dose-response curve with unchanged maximum response, and non-competitive antagonism showing depressed maximum response with no parallel shift. Include irreversible antagonism. Show clear labeled axes with log dose on x-axis and response percentage on y-axis. Medical textbook style diagram for MBBS exams.

Drug therapy diagram for glaucoma showing two types: Open angle glaucoma treatment (beta blockers like timolol reducing aqueous humor production, prostaglandin analogs like latanoprost increasing uveoscleral outflow, pilocarpine increasing outflow) and Acute congestive glaucoma treatment (pilocarpine miosis opening drainage angle, IV mannitol reducing IOP, acetazolamide reducing aqueous production). Clinical diagram style for MBBS pharmacology exam.

Classification diagram of anticholinesterase drugs for MBBS pharmacology exam. Show reversible anticholinesterases divided into: Short acting (edrophonium - diagnosis of myasthenia gravis), Medium acting (neostigmine, pyridostigmine, physostigmine - treatment of myasthenia, reversal of neuromuscular blockade), and Irreversible anticholinesterases (organophosphates - echothiophate for glaucoma, and toxic agents like malathion, parathion, nerve agents). Include mechanism: inhibition of acetylcholinesterase leading to ACh accumulation.