26. Pharmacology IV (Classifications of drugs in ANS) Flashcards
“Analeptics”
Stimulants
Drugs used to increase nerve activity in the CNS
✔️ reverses CNS depressant effects
🔸 elevates adnergic nt
🔸stimulates release of NOREPI
Stimulants
BQ: “Most toxic drug”
Strychnine
Amphetamines Methylphenidate Phendimethrazine Xanthines Strychnine - are examples of what drugs?
Stimulants or Analeptics
BQ: Xanthines
Found in: Teas, coffee, colas, cocoa
Caffeine
Theophylline
Theobromine
BQ: What xanthines are used to treat Asthma?
Theophylline
Theobromine
BQ: the only OTC stimulant
Caffeine
BQ: Stimulants can be used to treat: (“PONDA”) 🐼
(“PONDA”) 🐼🐼🐼 Parkinson’s disease Obesity Narcolepsy Depression Attention deficit hyperactive disorder (ADHD)
Increase daytime sleepiness
Can be tx by stimulants
Narcolepsy
Disease caused by degeneration of dopamine producing cells in the brain
Parkinson’s disease
Site of dopamine production
Substantia NIGRA
✔️ Parkinson’s disease: Degeneration of substantia nigra
Basal ganglia degeneration
Huntington’s disease
Drug of choice for Parkinsonism
L-DOPA
🔸 Boards: (✔️anticholinergic)
Other drugs for Parkinsonism: ✅ Increases dopamine - - - ✅Anticholinergic - Major : - Minor/slight:
Other drugs for Parkinsonism: ✅ Increases dopamine - L-Dopa (DOC!✨) - MAO-I - Stimulants
✅Anticholinergic
- Major : Belladonna alkaloids (Atropine/Scopolamine)
- Minor/slight: “DiTriBeAM”
BQ: What are the drugs that causes Parkinsonism-like symptoms?
1st generation antipsychotic agents
Division of the Autonomic nervous system regulated mainly by ACETYLCHOLINE
✅ REST AND DIGEST 💆🏼♀️🍌🍒🍉
Parasympathetic nervous system
Division of ANS regulated mainly by NOREPINEPHRINE
✅ Fight 👊🏻 or Flight ✈️
- Stress and Emergency situation
Sympathetic nervous system
Neurons before the ganglion
Pre ganglionic neurons
Neurons after the ganglion
Post ganglionic neuron
Neurons releasing ACH
Cholinergic neurons
Cholinergic neurons:
- Motor neurons in NMJ
- All pregang neurons (symp/para)
- Postgang of Parasymp
- Postgang of Sweat glands(symp*)
Nicotinic receptors are found:
Skeletal muscle
All Postganglionic neurons
Chromaffin cells
Muscarinic receptors are found:
All effector organs of parasymp
Sweat glands
Neurons releasing Norepinephrine
Adrenergic neuron
Adrenergic neuron found on:
Sympathetic post ganglionic neurons
Adrenergic receptors are found:
All effector organs of Sympathetic
EXCEPT: SWEAT GLANDS 🙅♀️
BQ: Most numerous Adrenergic receptor seen in the BLOOD VESSEL
Alpha 1
Effect of Alpha 1
BV: Vasoconstriction
BP: ⬆️
Effect of Alpha 2:
Vasodilation
Effect of Beta 1:
❤️ :
kidney:
❤️
- Inotropic : ⬆️ Force of contraction
- Chronotropic : ⬆️ Heart rate
KIdney: ⬇️ function
Beta 2
Lungs:
BV:
Beta 2:
Bronchodilation/relaxation**
Vasodilation ** (⬇️BP)
Alpha 1 / Beta 1 and 2 agonist
Dopamine
- A1 = ⬆️BP ✨
- B1 = ⬆️❤️
- B2 = Bronchodilation
Beta 1 and 2 receptor agonist
For: ✅Asthmatic attacks
Isoproterenol (✅Asthmatic attacks)
- B1: ⬇️BP
- B2: bronchodilation
BQ: Receptors of Norepinephrine A. Alpha B. Beta C. Alpha/Beta D. None
C. Alpha/Beta
Mainly: A1/A2 (“norA”)
Weak: B1/B2
Most potent alpha agonist
A1/A2 and B1/B2 agonist
Epinephrine
Norpinephrine is used for:
(mainly: A1) : “norA”
Hypotension
A1 = ⬆️ BP
BQ: Doc for Anaphylactic shock
Epinephrine (1:1000 IM)
During anaphylactic shock
BV: dilated = ⬇️BP
Bronchoconstriction
Epinephrine:
A1/A2 (⬆️BP)
B1/B2 (Bronchodilation)
Alpha 2 selective agonist
⬇️BP = drugs nato for HYPERTENSION
Clonidine (Catapres)
Methyldopa
Adrenergic Drugs that activate SYMPATHETIC nervous system but effect is Parasympathetic
✅ Alpha 2 = ⬇️BP
Clonidine
Methyldopa
“Sympathetic drug” used for Hypertensive patients
Alpha 2 selective agonist:
Clonidine (Catapres)
Methyldopa
Adrenergic Drug that can be used to treat CHF
A1 and B1 selective agonist
- Dobutamine
Selective Adrenergic drugs for ASTHMATIC ATTACKS
Beta 2 selective agonist
✅ Terbutaline
✅ Albuterol👶🏻 - Salbutamol👨🏻
Amphetamines activates what adrenergic receptors
Amphetamines - A1/A2 and B1/B2
Stimulants
Stimulates Release of NOREPINEPHRINE from adrenergic nerve terminal
(indirect)✔️
Tyramine
Mephentermine
Epinephrine: direct / indirect acting?
direct acting
Norepinephrine: direct / indirect acting?
Direct
Tyramine : direct/indirect?
Indirect
Mephentermine: Direct/Indirect?
Indirect
Amphetamine: direct/indirect/mixed?
Mixed acting!
BQ: All of the ffg drugs can reverse acute asthmatic attacks EXCEPT: A. Alpha receptor agonists B. Beta receptor agonists C. Ephedrine D. Epinephrine
A. Alpha receptor agonist
BQ: Norepinephrine can also reverse the lethal effects of anaphylactic shock. True or False?
False
BQ: Pre surgical management of Pheochromacytoma
Alpha 1,2 adrenergic blockers (Non selective alpha blockers)
BQ: example of selective A1 adrenergic blocker
Prazosin (-osin)
Competitive agonist of A1 receptors
✅ hypertension
✅ Benign prostatic hyperplasia
Selective alpha 1 adrenergic blocker (-osin)
(-OSIN)
Non selective alpha blocker
(-OLOL)
Non selective beta blocker
BQ: Propanolol contraindicated to patients with:
Asthma
BQ: Bronchodilators; used to reverse (propanolol + asthma)
Theophylline
Theobromine
Primary use of Non selective beta blocker
Anti arrythmia (for hypertensive)