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bitewing rad.pptx, definition, techniques by snm191129, has 16 slides with 192 views.A bitewing radiograph is a dental x-ray that focuses on the crowns of the upper and lower teeth in a specific area, primarily used to detect decay between teeth, bone loss and changes in the gum line.
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PARKINSON’S USMLE style question by dr ankush goyal by Dr Ankush goyal, has 43 slides with 234 views.Parkinsonism refers to a clinical syndrome characterized by a combination of motor and non-motor symptoms that resemble Parkinson’s disease (PD). It results from dysfunction in the basal ganglia, particularly due to dopamine deficiency in the substantia nigra. Key Features of Parkinsonism: 1. Bradykinesia – Slowness of movement with difficulty in initiating and executing voluntary movements. 2. Rigidity – Increased muscle tone, presenting as either: Lead-pipe rigidity (uniform resistance) Cogwheel rigidity (intermittent resistance with a ratchet-like quality) 3. Tremor – Resting tremor, typically "pill-rolling" (4-6 Hz), that improves with movement. 4. Postural Instability – Impaired balance leading to a higher risk of falls. Causes of Parkinsonism: 1. Idiopathic Parkinson’s Disease (PD) – The most common cause, due to progressive degeneration of dopaminergic neurons in the substantia nigra. 2. Drug-Induced Parkinsonism – Caused by dopamine-blocking agents (e.g., antipsychotics, metoclopramide, reserpine). 3. Atypical Parkinsonian Syndromes (Parkinson-plus syndromes) – Progressive conditions with additional features beyond classic Parkinsonism, such as: Multiple System Atrophy (MSA) Progressive Supranuclear Palsy (PSP) Corticobasal Degeneration (CBD) Dementia with Lewy Bodies (DLB) 4. Vascular Parkinsonism – Due to multiple small strokes affecting the basal ganglia. 5. Toxic or Metabolic Causes – Includes manganese poisoning, carbon monoxide exposure, Wilson’s disease. 6. Post-Encephalitic Parkinsonism – Rare, seen in survivors of encephalitis lethargica. Diagnosis: Clinical Evaluation – Based on cardinal motor symptoms. Response to Levodopa – Helps differentiate PD from other causes. Neuroimaging (MRI, DaTscan) – Useful in atypical cases. Management: Pharmacological Treatment: Levodopa (with carbidopa) Dopamine agonists (pramipexole, ropinirole) MAO-B inhibitors (selegiline, rasagiline) COMT inhibitors (entacapone) Anticholinergics (for tremors) Non-Pharmacological Treatment: Physiotherapy, speech therapy Deep Brain Stimulation (DBS) in selected cases
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Anatomy of the Tongue by Baasir Umair.pptx by Baasir Umair Khattak, has 48 slides with 244 views.Anatomy and Nervous Supply of the Tongue Presentation Overview This PowerPoint presentation provides a detailed anatomical and neurovascular description of the tongue, covering: • General Anatomy (Structure, Location, and Parts) • Muscle Classification (Intrinsic & Extrinsic) • Papillae of the Tongue (Types & Functions) • Arterial and Venous Drainage • Lymphatic Supply • Nervous Supply (Motor & Sensory) • Development of the Tongue • Clinical Correlations This presentation is designed for medical students, professionals, and anatomy enthusiasts to enhance their understanding of the tongue's anatomy and functions. 1. Anatomy of the Tongue The tongue is a muscular organ located in the oral cavity, primarily responsible for taste, speech, mastication, and deglutition. It is covered with mucosa, containing numerous taste buds and papillae that contribute to its sensory functions. 1.1 Location of the Tongue • The tongue extends from the hyoid bone in the center of the neck to the floor of the mouth. • It is attached posteriorly to the styloid process and the soft palate. • Inferiorly, it connects to the mandible and hyoid bone. 2. Parts of the Tongue The tongue is divided into three main parts: 1. Tip (Apex): The most anterior and mobile part. 2. Body: The central region, covered with papillae and taste buds. o The ventral (inferior) surface is smooth and connected to the lingual frenulum. o The dorsal (superior) surface is rough and interacts with the palate. 3. Base (Root): The most posterior part, housing lingual tonsils and foliate papillae. Divisions of the Tongue • The sulcus terminalis divides the tongue into: o Anterior 2/3 (Oral Part) o Posterior 1/3 (Pharyngeal Part) • The foramen cecum, a small depression, marks the embryological remnant of the thyroglossal duct. 3. Papillae of the Tongue The dorsal surface of the tongue contains four types of papillae, responsible for taste and sensation: 3.1 Circumvallate Papillae • Largest in size but least numerous. • Located anterior to the sulcus terminalis. • Contain taste buds and are innervated by the Glossopharyngeal Nerve (CN IX), despite being in the anterior 2/3 region. 3.2 Fungiform Papillae • Mushroom-shaped, scattered on the anterior 2/3 of the tongue. • Contain taste buds. • Innervated by the Facial Nerve (CN VII) via Chorda Tympani. 3.3 Foliate Papillae • Located on the posterolateral sides of the tongue. • Contain taste buds. 3.4 Filiform Papillae • Most numerous but do not contain taste buds. • Provide mechanical function by enhancing friction between food and the tongue. 4. Muscles of the Tongue The tongue consists of two muscle groups: 4.1 Intrinsic Muscles (Shape and Movement) • Superior Longitudinal • Inferior Longitudinal • Transverse • Vertical 4.2 Extrinsic Muscles (Positioning and Function) • Genioglossus • Hyoglossus • Styloglossus • Palatoglossus Each muscle has a specific origin, insertion, course, and function that aids in swallowing, articulation, and movement of the tongue.
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Genetic Control of Cellular Functions.pdf by MedicoseAcademics, has 59 slides with 613 views.These slides describe the role of genetic control in the regulation of cellular functions. Learning Objectives: 1. Describe the structure of DNA 2. Recognise the different types of RNA 3. Briefly describe the steps of transcription to elucidate the functions of different types of RNA 4. Briefly describe the process of translation 5. Discuss the mechanisms of genetic control of cell functions 6. Describe the cell cycle 7. Briefly describe the process of DNA replication 8. Describe the control of cell reproduction by telomeres and telomerase 9. Compare and contrast apoptosis and necrosis 10. Explain the pathophysiology of cancer and ageing
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Classification of Sympathomimetic+Baasir Umair.docx by Baasir Umair Khattak, has 3 slides with 238 views.Sympathomimetic Drugs (Adrenergic Agonists) – Overview and Classification Sympathomimetic drugs, also known as adrenergic agonists, are a class of medications that mimic the effects of endogenous catecholamines (adrenaline, noradrenaline, and dopamine) by stimulating adrenergic receptors. These drugs are widely used in clinical practice for conditions like asthma, cardiac arrest, hypotension, nasal congestion, and attention deficit disorders. 1. Classification Based on Chemical Structure Catecholamines (contain a catechol nucleus and amine group): Natural Catecholamines: Adrenaline, Noradrenaline, Dopamine Synthetic Catecholamines: Isoproterenol, Dobutamine Non-Catecholamines (lack a catechol nucleus, generally have longer duration of action): Short-acting beta agonists (SABAs): Albuterol, Terbutaline, Metaproterenol, Pirbuterol, Levalbuterol Long-acting beta agonists (LABAs): Salmeterol, Formoterol, Arformoterol, Bambuterol, Clenbuterol Ultra-long-acting beta agonists (ULABAs): Indacaterol, Olodaterol, Vilanterol Others: Ephedrine, Pseudoephedrine, Amphetamines, Oxymetazoline, Xylometazoline 2. Classification Based on Receptor Selectivity Non-selective Adrenergic Agonists: Adrenaline (stimulates α1, α2, β1, β2 receptors) Noradrenaline (stimulates α1, α2, β1 receptors with weak β3 action) Isoproterenol (stimulates β1, β2 receptors) Selective Adrenergic Agonists: α1 Agonists: Phenylephrine, Midodrine, Methoxamine (used in hypotension) α2 Agonists: Clonidine, Methyldopa, Brimonidine (used in hypertension, glaucoma) β1 Agonists: Dobutamine, Denopamine (used in heart failure) β2 Agonists: SABAs, LABAs (used in asthma, COPD) β3 Agonists: Mirabegron, Vibegron (used in overactive bladder) Dopaminergic Agonists (D1 receptor): Fenoldopam (used in hypertension) 3. Classification Based on Pharmacological Action Pressor Agents (Increase Blood Pressure): Noradrenaline, Dopamine, Phenylephrine, Ephedrine Cardiac Stimulants: Dobutamine, Xamoterol (used in heart failure) Bronchodilators: SABAs, LABAs (used in asthma, COPD) Nasal Decongestants: Oxymetazoline, Xylometazoline, Phenylephrine CNS Stimulants: Amphetamines, Methylphenidate (used in ADHD, narcolepsy) Anorectics (Appetite Suppressants): Fenfluramine, Sibutramine Uterine Relaxants (Tocolytics): Ritodrine, Isoxsuprine (used in preterm labor) 4. Classification Based on Mechanism of Action Direct-acting Adrenergic Agonists: Bind directly to adrenergic receptors (e.g., adrenaline, phenylephrine) Indirect-acting Adrenergic Agonists: Increase endogenous catecholamines (e.g., amphetamines, cocaine) Mixed-acting Adrenergic Agonists: Both direct and indirect actions (e.g., ephedrine, pseudoephedrine)
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Shoola in Ayurveda Dr Akshay Shetty.pptx by Akshay Shetty, has 16 slides with 60 views.This document deals with shoola its definition, types and difference between Parinama shoola ad Annadrava shoola with etiology,Clinical features and prognosis
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Nasal Decongestants and Respiratory Stimulants by SivaGanesh552177, has 9 slides with 294 views.The title "Nasal Decongestants and Respiratory Stimulants" is covered under Unit I of the Pharmacology of drugs acting on the Respiratory System, which is included in the course of Pharmacology III with course code BP602.
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Symapthomimetics Based on Selectivity and Generation.pdf by Baasir Umair Khattak, has 1 slides with 265 views.Classification of Selective Alpha Agonists Based on Generation Selective alpha agonists can be classified into first-generation, second-generation, and third-generation based on their pharmacological properties, receptor specificity, and clinical applications. 1. First-Generation Selective Alpha Agonists (Non-subtype selective, older agents, higher side effects) These drugs act on α1 or α2 receptors but with lower specificity and more systemic side effects. Selective α1 Agonists (Vasoconstrictors, Hypotension Treatment) Methoxamine – Used to treat hypotension. Phenylephrine – Used as a nasal decongestant and to increase blood pressure. Midodrine – Used for orthostatic hypotension. Metaraminol – Used in hypotensive states and shock. Selective α2 Agonists (Centrally Acting, Anti-Hypertensive Drugs) Clonidine – Used for hypertension, ADHD, and withdrawal syndromes. Methyldopa – Used for hypertension, especially in pregnancy. Guanfacine – Used in hypertension and ADHD. 2. Second-Generation Selective Alpha Agonists (More receptor selectivity, improved safety profile, fewer side effects) Selective α1 Agonists (Longer Duration, Specific Targeting) Amidephrine – Used in hypotension. Selective α2 Agonists (Better CNS Penetration, Neurological Uses) Brimonidine – Used in glaucoma (reduces intraocular pressure). Apraclonidine – Used in short-term treatment of glaucoma. Tizanidine – Used as a muscle relaxant in spasticity. Lofexidine – Used in opioid withdrawal treatment. 3. Third-Generation Selective Alpha Agonists (Highly selective, fewer side effects, newer therapeutic applications) Selective α2 Agonists (High Selectivity, Novel Applications) Dexmedetomidine – Used as a sedative in ICU and anesthesia. Medetomidine – Used in veterinary anesthesia. Fadolmidine – Investigated for pain relief with fewer cardiovascular effects. Detomidine – Used in veterinary medicine for sedation Classification of Selective Beta Agonists Based on Generation Selective β-adrenergic agonists can be classified into three generations based on their receptor selectivity, duration of action, and therapeutic advancements. 1. First-Generation Selective Beta Agonists (Non-specific, Short-acting, Higher Side Effects) Early β-agonists with partial selectivity, often affecting both β1 and β2 receptors. Shorter duration of action, leading to frequent dosing requirements. Key Drugs: Isoproterenol – A non-selective β1 and β2 agonist, used for bradycardia and heart block. Dobutamine – A selective β1 agonist, used in acute heart failure and cardiogenic shock. Ritodrine – A selective β2 agonist, previously used for delaying preterm labor. 2. Second-Generation Selective Beta Agonists (More Selective, Longer Duration, Improved Safety) These drugs show improved selectivity for either β1 or β2 receptors, reducing unwanted cardiac effects. Longer-acting compared to first-generation. Selective β1 Agonists (Primarily Cardiac Stimulants) Denopamine – Used in heart failure treatment. Prenalte
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CHAPTER-3-FORENSIC-NURSING - 5th Semester by Anand Gowda, has 24 slides with 15 views.Forensic Nursing
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echinocandins case presentation.dr ANKUSH GOYAL GMC PATIALA by Dr Ankush goyal, has 10 slides with 151 views.Echinocandins: A Comprehensive Overview Introduction Echinocandins are a class of antifungal agents that have gained significant prominence in the treatment of invasive fungal infections, particularly those caused by Candida and Aspergillus species. They are considered second-line or first-line treatment options in cases of azole-resistant fungal infections. This document provides an in-depth discussion of echinocandins, including their chemical structure, mechanism of action, pharmacokinetics, spectrum of activity, clinical applications, resistance mechanisms, adverse effects, and future perspectives. Historical Background Echinocandins were first discovered in the late 20th century when researchers were exploring natural antifungal compounds derived from fungi and other microorganisms. The first echinocandin, pneumocandin B0, was isolated from Glarea lozoyensis. Further modifications led to the development of caspofungin, micafungin, and anidulafungin, which are the three currently approved echinocandins for clinical use. Chemical Structure Echinocandins are cyclic lipopeptides composed of a large cyclic hexapeptide core linked to a long-chain fatty acid side group. This unique structure is crucial for their antifungal activity and their pharmacokinetic properties. The lipid tail enhances the compound's binding affinity to fungal cells, while the cyclic peptide core is responsible for inhibiting fungal cell wall synthesis. Mechanism of Action Echinocandins exert their antifungal effects by selectively inhibiting the enzyme (1→3)-β-D-glucan synthase, which is essential for the synthesis of β-glucan, a major component of the fungal cell wall. The inhibition of β-glucan synthesis results in cell wall weakening, osmotic instability, and ultimately fungal cell lysis. This mechanism makes echinocandins highly selective for fungi, as mammalian cells lack β-glucan. Pharmacokinetics Echinocandins are administered intravenously due to their poor oral bioavailability. The pharmacokinetic properties of caspofungin, micafungin, and anidulafungin vary slightly, but they share several common features: Distribution: Echinocandins exhibit extensive tissue penetration, particularly in the liver, spleen, lungs, and kidneys. However, their penetration into the cerebrospinal fluid (CSF) is limited, making them less effective for central nervous system fungal infections. Metabolism: Caspofungin undergoes hepatic metabolism through hydrolysis and N-acetylation, while micafungin is metabolized by the liver via arylsulfatase and catechol-O-methyltransferase. Anidulafungin undergoes spontaneous degradation in the plasma without significant hepatic metabolism. Elimination: The elimination of echinocandins varies; caspofungin is excreted through both hepatic and renal routes, micafungin is eliminated hepatically, and anidulafungin is primarily excreted via fecal routes due to spontaneous degradation. Half-life: Caspofungin has a half-life of approximately 9-
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PARKINSON’S USMLE style question by dr ankush goyal by Dr Ankush goyal, has 43 slides with 234 views.Parkinsonism refers to a clinical syndrome characterized by a combination of motor and non-motor symptoms that resemble Parkinson’s disease (PD). It results from dysfunction in the basal ganglia, particularly due to dopamine deficiency in the substantia nigra. Key Features of Parkinsonism: 1. Bradykinesia – Slowness of movement with difficulty in initiating and executing voluntary movements. 2. Rigidity – Increased muscle tone, presenting as either: Lead-pipe rigidity (uniform resistance) Cogwheel rigidity (intermittent resistance with a ratchet-like quality) 3. Tremor – Resting tremor, typically "pill-rolling" (4-6 Hz), that improves with movement. 4. Postural Instability – Impaired balance leading to a higher risk of falls. Causes of Parkinsonism: 1. Idiopathic Parkinson’s Disease (PD) – The most common cause, due to progressive degeneration of dopaminergic neurons in the substantia nigra. 2. Drug-Induced Parkinsonism – Caused by dopamine-blocking agents (e.g., antipsychotics, metoclopramide, reserpine). 3. Atypical Parkinsonian Syndromes (Parkinson-plus syndromes) – Progressive conditions with additional features beyond classic Parkinsonism, such as: Multiple System Atrophy (MSA) Progressive Supranuclear Palsy (PSP) Corticobasal Degeneration (CBD) Dementia with Lewy Bodies (DLB) 4. Vascular Parkinsonism – Due to multiple small strokes affecting the basal ganglia. 5. Toxic or Metabolic Causes – Includes manganese poisoning, carbon monoxide exposure, Wilson’s disease. 6. Post-Encephalitic Parkinsonism – Rare, seen in survivors of encephalitis lethargica. Diagnosis: Clinical Evaluation – Based on cardinal motor symptoms. Response to Levodopa – Helps differentiate PD from other causes. Neuroimaging (MRI, DaTscan) – Useful in atypical cases. Management: Pharmacological Treatment: Levodopa (with carbidopa) Dopamine agonists (pramipexole, ropinirole) MAO-B inhibitors (selegiline, rasagiline) COMT inhibitors (entacapone) Anticholinergics (for tremors) Non-Pharmacological Treatment: Physiotherapy, speech therapy Deep Brain Stimulation (DBS) in selected cases
PARKINSON’S USMLE style question by dr ankush goyalPARKINSON’S USMLE style question by dr ankush goyal
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Anatomy of the Tongue by Baasir Umair.pptx by Baasir Umair Khattak, has 48 slides with 244 views.Anatomy and Nervous Supply of the Tongue Presentation Overview This PowerPoint presentation provides a detailed anatomical and neurovascular description of the tongue, covering: • General Anatomy (Structure, Location, and Parts) • Muscle Classification (Intrinsic & Extrinsic) • Papillae of the Tongue (Types & Functions) • Arterial and Venous Drainage • Lymphatic Supply • Nervous Supply (Motor & Sensory) • Development of the Tongue • Clinical Correlations This presentation is designed for medical students, professionals, and anatomy enthusiasts to enhance their understanding of the tongue's anatomy and functions. 1. Anatomy of the Tongue The tongue is a muscular organ located in the oral cavity, primarily responsible for taste, speech, mastication, and deglutition. It is covered with mucosa, containing numerous taste buds and papillae that contribute to its sensory functions. 1.1 Location of the Tongue • The tongue extends from the hyoid bone in the center of the neck to the floor of the mouth. • It is attached posteriorly to the styloid process and the soft palate. • Inferiorly, it connects to the mandible and hyoid bone. 2. Parts of the Tongue The tongue is divided into three main parts: 1. Tip (Apex): The most anterior and mobile part. 2. Body: The central region, covered with papillae and taste buds. o The ventral (inferior) surface is smooth and connected to the lingual frenulum. o The dorsal (superior) surface is rough and interacts with the palate. 3. Base (Root): The most posterior part, housing lingual tonsils and foliate papillae. Divisions of the Tongue • The sulcus terminalis divides the tongue into: o Anterior 2/3 (Oral Part) o Posterior 1/3 (Pharyngeal Part) • The foramen cecum, a small depression, marks the embryological remnant of the thyroglossal duct. 3. Papillae of the Tongue The dorsal surface of the tongue contains four types of papillae, responsible for taste and sensation: 3.1 Circumvallate Papillae • Largest in size but least numerous. • Located anterior to the sulcus terminalis. • Contain taste buds and are innervated by the Glossopharyngeal Nerve (CN IX), despite being in the anterior 2/3 region. 3.2 Fungiform Papillae • Mushroom-shaped, scattered on the anterior 2/3 of the tongue. • Contain taste buds. • Innervated by the Facial Nerve (CN VII) via Chorda Tympani. 3.3 Foliate Papillae • Located on the posterolateral sides of the tongue. • Contain taste buds. 3.4 Filiform Papillae • Most numerous but do not contain taste buds. • Provide mechanical function by enhancing friction between food and the tongue. 4. Muscles of the Tongue The tongue consists of two muscle groups: 4.1 Intrinsic Muscles (Shape and Movement) • Superior Longitudinal • Inferior Longitudinal • Transverse • Vertical 4.2 Extrinsic Muscles (Positioning and Function) • Genioglossus • Hyoglossus • Styloglossus • Palatoglossus Each muscle has a specific origin, insertion, course, and function that aids in swallowing, articulation, and movement of the tongue.
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Baasir Umair Khattak
48 slides244 views
Classification of Sympathomimetic+Baasir Umair.docx by Baasir Umair Khattak, has 3 slides with 238 views.Sympathomimetic Drugs (Adrenergic Agonists) – Overview and Classification Sympathomimetic drugs, also known as adrenergic agonists, are a class of medications that mimic the effects of endogenous catecholamines (adrenaline, noradrenaline, and dopamine) by stimulating adrenergic receptors. These drugs are widely used in clinical practice for conditions like asthma, cardiac arrest, hypotension, nasal congestion, and attention deficit disorders. 1. Classification Based on Chemical Structure Catecholamines (contain a catechol nucleus and amine group): Natural Catecholamines: Adrenaline, Noradrenaline, Dopamine Synthetic Catecholamines: Isoproterenol, Dobutamine Non-Catecholamines (lack a catechol nucleus, generally have longer duration of action): Short-acting beta agonists (SABAs): Albuterol, Terbutaline, Metaproterenol, Pirbuterol, Levalbuterol Long-acting beta agonists (LABAs): Salmeterol, Formoterol, Arformoterol, Bambuterol, Clenbuterol Ultra-long-acting beta agonists (ULABAs): Indacaterol, Olodaterol, Vilanterol Others: Ephedrine, Pseudoephedrine, Amphetamines, Oxymetazoline, Xylometazoline 2. Classification Based on Receptor Selectivity Non-selective Adrenergic Agonists: Adrenaline (stimulates α1, α2, β1, β2 receptors) Noradrenaline (stimulates α1, α2, β1 receptors with weak β3 action) Isoproterenol (stimulates β1, β2 receptors) Selective Adrenergic Agonists: α1 Agonists: Phenylephrine, Midodrine, Methoxamine (used in hypotension) α2 Agonists: Clonidine, Methyldopa, Brimonidine (used in hypertension, glaucoma) β1 Agonists: Dobutamine, Denopamine (used in heart failure) β2 Agonists: SABAs, LABAs (used in asthma, COPD) β3 Agonists: Mirabegron, Vibegron (used in overactive bladder) Dopaminergic Agonists (D1 receptor): Fenoldopam (used in hypertension) 3. Classification Based on Pharmacological Action Pressor Agents (Increase Blood Pressure): Noradrenaline, Dopamine, Phenylephrine, Ephedrine Cardiac Stimulants: Dobutamine, Xamoterol (used in heart failure) Bronchodilators: SABAs, LABAs (used in asthma, COPD) Nasal Decongestants: Oxymetazoline, Xylometazoline, Phenylephrine CNS Stimulants: Amphetamines, Methylphenidate (used in ADHD, narcolepsy) Anorectics (Appetite Suppressants): Fenfluramine, Sibutramine Uterine Relaxants (Tocolytics): Ritodrine, Isoxsuprine (used in preterm labor) 4. Classification Based on Mechanism of Action Direct-acting Adrenergic Agonists: Bind directly to adrenergic receptors (e.g., adrenaline, phenylephrine) Indirect-acting Adrenergic Agonists: Increase endogenous catecholamines (e.g., amphetamines, cocaine) Mixed-acting Adrenergic Agonists: Both direct and indirect actions (e.g., ephedrine, pseudoephedrine)
Classification of Sympathomimetic+Baasir Umair.docxClassification of Sympathomimetic+Baasir Umair.docx
Classification of Sympathomimetic+Baasir Umair.docx
Baasir Umair Khattak
3 slides238 views
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