8.4 Pharmacological Profile Flashcards
What’s the action of long acting barbiturates?
- sedative
- hypnotic
- anti convulsant properties
- depress sensory cortex
- decrease motor activity
- altar cerebellar function
- produce drowsiness
What are the subdivisions of anti anxiety drugs?
- Benzodiazepines (short term only)
- non- benzodiazepines
What are the classes of antidepressants?
- Tricyclic (TCAs)
- Monoamine Oxidase Inhibitors (MAOI)
- Selective Serotonin Reuptake (SSRI)
- Serotonin-norepinephrine (SNRI)
What are the actions of TCA?
Increase levels of norepinephrine and serotonin by inhibiting their reuptake and blocking the action of acetylcholine
What is the action of MAOI?
inhibits the activity of monoamine oxidase resulting in increased endogenous neuro-hormones
What is the action of SSRI?
Increase serotonin by inhibiting neuronal uptake to CNS
When shouldn’t you give TCA’s
- hypersensitivity to formulation
- within 14 days of MAOI’s administration
- acute recovery from MI
What receptors do Antipsychotics block?
- dopamine receptors in the brain
Use of Stimulants
Treatment of narcolepsy and as adjunctive treatment in the management of ADHD
Examples of Anticonvulsives
- Diazepam
- Lorazepam
- Midazolam
- Clonazepam
- Phenytoin
What medication acts as an antiemetic mainly by diminishing motion sickness?
Meclizine
Examples of Antiemetics
- Prochlorperazine
- Chlorpromazine
- Metoclopramide
- Ondansetron
- Prochlorperazine
- Promethazine
Examples of Antivertigo medications
- Meclizine
- Diphenhydramine
- Benzodiazepines
What is the action of Local Anesthetics?
Inhibits transport of ions across neuronal membranes, thereby preventing initiation and conduction of normal nerve impulses
Action of Ketamine
Non competitive antagonist of glutamate, causing neuro-inhibition and anesthesia where the patient is dissociated form the surrounding
Examples of Local Anesthesia
- lidocaine
- bupivacaine
Example of general anesthesia
ketamine
What are the classes of analgesics
- salicylate
- non- salicylate
- NSAID
- urinary analgesics
Action of salicylates
- dilates peripheral blood vessels (cools body)
- prolongs bleeding by inhibiting aggregation of platelets
Uses of salicylates
- relief of mild to moderate pain
- reduction of body temp
- inflammatory conditions
- decreases risk of MI
- prevention and treatment of blood clots
Contraindications of salicylates
- pregnancy
- bleeding disorders
Examples of salicylates
ASA
Adverse effects of non salicylates
- severe hepatic impairment or severe active liver disease
Contraindications of non salicylate
- Hepatoxicity: acute liver failure
- do not exceed 4g daily
Patient management of non-salicylate
- can be administered w/o food
- safe for pregnancy
- asses alcohol use
Examples of non salicylates
- acetaminophen
- benzocaine- menthol
Action of NSAIDs
Inhibit COX-1 and COX-2 (non selective) or Cox-2 (selective) which is responsible for prostaglandin synthesis
- anti-inflammatory
- analgesic
- antipyretic
Adverse effects of NSAIDs
- Nausea, vomiting
- increase risk of heart attack or stroke
Contraindication for Celecoxib
Sulfa allergy
Contraindication for Ibuprofen
- peptic ulcer
- GI bleed
- HTN
When should you stop NSAIDS?
- prolonged bleeding
- dark stools
Examples of NSAIDs
- Ibuprofen
- Ketorolac
- Naproxen
- Celecoxib
- Meloxicam
Examples of COX2 inhibitor NSAIDS
- celecoxib
- meloxicam
Action of narcotic analgesics
Bind to opiate receptors in the CNS where they act as agonists of endogenously occurring opioid peptides. The result is alteration to perception of and response to pain
Use of Narcotic analgesics
short term management of moderate to severe pain
Adverse effects of narcotic analgesics
- constipation
- respiratory depression
When shouldn’t you give narcotic analgesics
- head injury
- ICP
Patient management of narcotic analgesics
- avoid use of narcotics and benzodiazepines or other CNS depressants when possible
Examples of narcotic analgesics
- codeine
- fentanyl
- morphine
Action of Naloxone
- competitive antagonist that bind to the opioid receptors with higher affinity than agonist but does not activate the receptor.
- This effectively blocks the receptor, preventing the body from responding to opiates and endorphins
Withdrawal sx of opioids
pain, tachycardia, HTN, fever, sweating, abdominal cramps, diarrhea, nausea, vomiting, agitation and irritability
Contraindications for naloxone
- hypersensitivity to naloxone
- CAD
- pregnant women
- opioid dependent patients
How do H1 antihistamines work?
binds to histamine H1 receptors in mast cells
What is the difference between 1st and 2nd generation antihistamines
- 1st generation has more side effects such as drowsiness
- 2nd generation has few CNS side effects
Use of H1 antihistamines
- treat allergic reactions
- insomnia
- motion sickness
- vertigo
Use of H2 antihistamines
- binds to H2 receptors in upper GI tract
- treats gastric acid conditions
- some relief of Parkinson-like reaction
Contraindications/warnings of antihistamine
- pregnancy
- counseled on operating heavy machinery
Examples of 1st generation antihistamine
- diphenhydramine
- hydroxyzine
- promethazine
Examples of 2nd generation antihistamine
- cetirizine
- fexofenadine
- loratadine
How do decongestants work?
Induces vasoconstriction of the blood vessels in the nose, throat and paranasal sinuses
Active ingredients in decongestants
- pseudoephedrine
- phenylephrine
What adverse effect can decongestants cause due to vasoconstriction
- HTN
- paired with antihistamines, may lessen effect but do not cancel each other out
Contraindications/ warnings of decongestants
- not recommended for pregnancy
- over use of topical can cause rebound nasal congestion
Examples of decongestants
- oxymetazoline (afrin, don’t use for more than 3 days)
- pseudoephedrine
- phenylephrine
Action of beta2 agonist (bronco dilators)
Beta2 receptors are in bronchial smooth muscle and when stimulated cause relaxation (dilation) of bronchioles
What can beta2 agonists be used for?
Reversible air way obstruction caused by:
- bronchial asthma
- exercise induced bronchospasm
- emphysema
Excessive use of beta2 agonists may cause what?
- excessive use may result in paradoxical bronchospasm
- tachycardia
Contraindication/ Caution/ Warnings of beta2 agonists
- cardiac arrhythmias
- beta blockers my inhibit the effect of beta2 agonists
- caution with DM, may cause increase blood glucose
Patient management of beta2 agonists
Provide a spacer and face mask
muscarinic antagonists relieve sx and manage what?
- Relief of bronchial asthma
- management of COPD
Adverse effects of anticholinergic
- Red as a beet (flushed face/sleepy)
- blind as bat (blurred vision)
- stuffed as a pipe (stuffed as a pipe)
- mad as a hatter (confusion)
- Hot as a hare (increased HR/body temp)
- Dry as bone (dry mouth)
Contraindication/warning of muscarinic antagonist/anticholinergics
- arrhythmias
- use in pregnancy if potential benefit outweighs risk
Examples of muscarinic antagonist/anticholinergics
- ipratropium
- tiotropium
What is Leukotriene?
What does a leukotriene antgonist result in?
- Leukotriene is a broncho constrictive substance released by body during inflammation
- Antagonist results in bronchodilation
Mast cell stabilizer stop the release of a substance that causes what in the respiratory tract?
- bronchoconstriction
- inflammation
What conditions do Leukotriene Antagonist and Mast Cell stabilizer treat?
- treatment of asthma
- treatment of COPD
Contraindication/warning/caution of leukotriene antagonist and mast cell stabilizer
- acute asthma/bronchospasms
- ASA sensitive asthmatics
Action of Inhaled Corticosteroids
- suppressing inflammation
- decrease inflammatory process in the air way through inhibiting multiple different inflammatory cytokines
What is a common condition caused from inhaled corticosteroids?
How do you prevent it?
- Candida Albicans (yeast infection)
- patient should rinse mouth with water after using inhaler
Contraindication of inhaled corticosteroids
caution with compromised immune system
Action of antitussives
- central acting: depresses cough center
- peripheral acting: anesthetize stretch receptors
What does an antitussive do?
relieves non productive cough
Adverse effects of codeine
- respiratory depression
- euphoria
- sedation
Contraindication/warnings/caution of antitussives
- persistent cough (greater than 2 weeks)
- codeine with respiratory disorders
Examples of Antitussives
- benzonatate
- codeine sulfate
Action of mucolytic
- loosens and mobilize thick mucus from respiratory system
How does an expectorant work?
reduces viscosity of tenacious secretions by increasing respiratory tract fluid
Contraindications of mucolytic and expectorants
persist cough
Example of expectorant
guaifenesin
How do antiarrhythmics work?
Decrease symptomatology, increases hemo-dynamic performance
Action of Class 1 Antiarrhythmic
depresses myocardial excitability to electrical stimuli thus decreasing pulse rate
Action of Class 2 Antiarrhythmic
Beta blockers block stimulation of beta receptors of the heart