B: 8-13 Flashcards
Non selective B-R antagonists
Propranolol
Timolol
Pindolol
Sotalol
Pls Tell People Sorry- we dont treat CHF
Which Non selective B-R antagonists is given topically?
To treat what?
Timolol
Glaucoma
Propranolol drug properties
Oral, Parenteral Higly lipid solubule Freely enters CNS 4-6 h Local anesthetic effect
Which Non selective B-R antagonists has a local anesthetic effect and how?
Propranolol
Bcs. it inhibits Na+ ch.
Propranolol indications
HTN Antiarrhytmic class II (treat + prophylaxis)
Thyrotoxicosis
Essential tremor
Angina
Migraine
HA - TEAM
How does Propranolol treat angina?
↓ HR
↓ O2 demand
↑ diastolic perfusion
Pindolol effect
partial agonist action; less bronchospasm for pts with asthma
Intrinsic sympathoimetic activity
Local anesthetic effect
Pindolol indications
Hypertensive treatment in asthma/COPD patients
Avoid in HF!
Which Non selective B-R antagonists should be avoided in HF?
Pindolol
Sotalol R preferance
B non selective
K+ ch. antagonist
Sotalol
How to give? Duration of action?
Oral
7 h
Sotalol indications
Antyarrhythmic class III
Ventricular arrhythmias
A. Fib
Sotalol side effects
Dose dependent Torsade-de-Pointes
אתה שותה סודה וזה מוריד ומרים אותך כמו טידיפי באקג
B1 selective antagonists
A-BEAM
Atenolol Bisoprolol Esmolol Acebutalol- partia agonis Metoprolol
Nevibolol
Metoprolol
Bisoprolol
Nebivolol
Indications
HTN Chronic HF Angina AA class II Acute coronary syndrome
HC-AAA
Which B blocker has an NO dependant vasodil. effect?
Nebivolol
Metoprolol
Bisoprolol
Nebivolol
Which has the longest duration of action?
Bisoprolol
עושה להם בית ספר
Which B blocker has a local anesthetic effect?
B1-selective:
Metoprolol
Acebutol
non-selective:
Pindolol
Propanolol
Which B blocker has a short (10 min) duration of action?
Esmolol (IV)
Esmolol indications
Arrhythmias assosiated with thyroid storm
Perioperative
Hypertensive emergencies
B blockers side effects
AV block Heart failure Bradyarrhythmias Bronchospasms (fatal in asthmatics) CNS seadtion Hypoglycemia Hyperlipidemia
Highest lipid solubility B blockers
Propranolol
Nebivolol
Bisoprolol
Peanut butter N jelly it has a lot of fat
BPN
lowest lipid solubility B blockers
Atenolol
Sotalol
If you want nice ass you need to eat less fat
B blockers contraindications
Acute heart failure
Cardiogenic shcok
Careful in case of Asthma/COPD
Careful in DM
B blockers with local anesthetic effect
Acebutol
Labetalol
Metoprolol
Pindolol
Propranolol
Spasmolytic agents
Diazepam: GABA-A agonist
Baclofen: GABA-B agonist
Tizanidine: a2 agonist
Tolperisone: Inhibition of Ca2+ and Na+ ch.
Diazepam receptror preferance
GABA-A
DiAAAAAzepam
Diazepam MOA
Increases interneuron inhibition of primary motor afferents in spinal cord
- bind post synaptic GABA-A receptor –> facilitate Cl- channel opening and increase frequency
- membrane hyperpolarization
Diazepam metabolism and duration of action
Hepatic
12-24 h
Diazepam indications
Centrally-acting spasmolytlcs
- Chronic spasm (Cerebral palsy, stroke, spinal injury)
- Acute spasm due to muscle injury
Diazepam side effects
CNS depressant
Tolerance
Dependent liability
What is an GABA-B agonist?
Baclofen
Baclofen MOA
Pre and post synaptic inhib. of motor output in the spinal cord
Pre- and postsynaptic
GABA-B receptor activation –> facilitate spinal inhibition of motor neurons
Baclofen
How to give?
Oral
Intrathecal for severe spasticity
Baclofen indications
Spasm (Cerebral palsy, stroke, multiple sclerosis)
Baclofen side effects
Sedation
Weakness
Rebound spasticity when abrupt withdrawal
Spasmolytic a2 agonist
Tizanidine
Tizanidine
Tell me about it
- a2 Agonist in spinal cord
- Pre and post synaptic inhibition of reflex motor output in the spinal cord
Oral
Renal and hepatic elimination
3-6 h
Tizanidine indications
Spasm (stroke, multiple sclerosis)
-Oral for acute and
chronic spasms
Tizanidine side effects
Wekness Sedation Hypotension Hepatotoxiciy Rebound HTN when abrupt withdrawal
Tolperisone MOA
Inhibition of muscle stretch reflex
Reduction of muscle reflex
Oral
Hungarian
-inhibition of Na & Ca channels
Tolperisone indication
Acute spasm due to muscle injury
No used in chronic spasm
Tolperisone side effects
Sedation
Confusion
Ocular effects
Strong anti muscarinic effects
SOS-C
Direct acting muscle relaxants
Dantrolene
Botulinium toxin
Dentrolene MOA
RyR1 antagonist → Blocks Ca2+ release ch. in the Sarcoplamis reticulum of skeletal muscle → reduces actin-myosin interaction
Dentrolene
How to give? Duration?
Oral, IV
4-6 h
Dentrolene indications
- Malignant hyperthermia (IV)
- Neuroleptic malignant syndrome (NMS)
Spasm (Crebral palsy, multiple sclerosis)
-Oral for acute and chronic
spasms
Dentrolene side effects
Muscle weakness
Hepatotoxicity