Parkinsonism, Antipsychotics, Antidepressants, Opioids, Drugs of Abuse Flashcards
Drugs causing Parkinsonism
Typical antipsychotics
Reserpine
MPTP ( methylphenyltetrahydropyridine)
Primary drug for Parkinson’s, MOA?
Levodopa-Carbidopa
Levodopa is a dopamine precursor. Carbidopa inhibits peripheral metabolism via dopa decarboxylase
On-off phenomena
Alternating periods of improved mobility and akinesia
Wearing-off phenomena
Deterioration of drug effects in between medication doses
Due to progressive destruction of nigrostriatal neurons that occur with disease progression
Partial agonist at dopamine D2 in brain
Bromocriptine
Pergolide
Partial agonist at dopamine D3 receptors in brain
Pramipexole
Ropinirole
Used in off periods, alcoholism, opiate addiction. MOA?
Apomorphine
Partial D3 agonist
Antagonist at 5-HT and alpha adrenoceptors
Premedicate with trimethobenzamide to prevent severe nausea
MAO type B inhibitor
Decrease degradation of dopamine
Selegiline
Rasagiline
COMT inhibitor
Prolongs response to levodopa
Entacapone
Tolcapone
Antiparkinsonism and antiviral drug.
MOA?
Amantadine
Adenosine antagonist
Anticholinergic antiparkinsonism drugs
Benztropine Biperiden Trihexyphenidyl Orphenadrine Blocks muscarinic receptors on cells in the striatum
MOA of typical antipsychotics. Examples?
Block of D2 receptors»_space; 5-HT2 receptors
Chlorpromazine
Thioridazine
Haloperidol
Primary signs of Parkinsonism
Tremors Rigidity Akinesia Postural instability TRAP!
Locations of D2 receptors
Putamen, nucleus accumbens, cerebral cortex, hypothalamus
Pleasure center
Nucleus accumbens
Toxic effect of antipsychotics in endocrine system
Hyperprolactinemia- amenorrhea, galactorrhea, infertility, impotence
Perioral tremor, manifests around 4 mos-4 years
Rabbit syndrome
Used in rabbit syndrome
Benztropine
Typical antipsychotic with increased risk of corneal and lens deposits
Chlorpromazine
Typical antipsychotics with increased risk for retinal deposits
Thioridazine
Only antipsychotic with fatal overdose
Thioridazine
Used in schizophrenia, huntington’s disease, tourette’s syndrome.
Least sedating among typical antipsychotics
Haloperidol
MOA of atypical antipsychotics
Block of 5-HT2 receptors»_space;D2 receptors
Only antipsychotic that reduces risk of suicide.
SE include agranulocytosis, hypersalivation, hyperglycemia, weight gain, ileus, seizures.
Clozapine
Used in anorexia nervosa, depression, schizophrenia
Olanzapine
Atypical antipsychotic whose SE include priapism, somnolence, fatigue, sleep paralysis, hypnagogic hallucinations.
Quetiapine
Only antipsychotic approved for schizophrenia in the young
Risperidone
Antipsychotic whose SE include QT prolongation, Torsades, postural hypotension.
Ziprasidone
Least sedating among atypical antipsychotics. Used in autism, cocaine dependence, depression, schizophrenia and other psychotic disorders.
Aripiprazole
Atypical antipsychotics
Clozapine Olanzapine Quetiapine Risperidone Ziprasidone Aripiprazole
Features of neuroleptic malignant syndrome?
Drug that can cause it?
Haloperidol FEVER Fever Encephalopathy Vitals unstable Elevated CPK Rigidity
Treatment of bipolar disorder. Has slow onset of action.
Lithium
Teratogenic effect of lithium
Eibstein anomaly- low implanted tricuspid valve
Treatment for overdose of lithium
Hemodialysis
Threshold of toxicity of lithium
2 mEq/L
Amine hypothesis of mood
Brain amines, NE and serotonin, are neurotransmitters in pathways that function in the expression of mood
Classification of antidepressants
Tricyclic antidepressants Selective serotonin reuptake inhibitors Serotonin-norepinephrine reuptake inhibitors Serotonin receptor antagonists Heterocyclic antidepressants Monoamine oxidase inhibitors
TCAs. MOA?
Imipramine, amitriptyline
Block Norepinephrine and serotonin receptors
TD and LD of TCAs
7 and 15 mg/kg
Features of TCA toxicity
Coma
Convulsions
Cardiotoxicity
Used in TCA overdose
Bicarbonate
SSRIs
Fluoxetine Paroxetine Citalopram Escitalopram Sertraline Fluvoxamine
Halflife of SSRIs
1 week
Drugs that can cause erectile dysfunction
A SORE PEnis can't Fuck Hard! SSRIs Opiates Risperidone Ethanol Propanolol Estrogen Spironolactone Finasteride Hydrochlorothiazide
Serotonin syndrome
FAT CHD Fever Agitation Tremor Clonus Hypereflexia Diaphoresis
SNRIs
Venlafaxine
Duloxetine
Desvenlafaxine
Serotonin antagonist, can cause priapism
Trazodone
Drugs that can cause priapism
Trazodone Papaverine Sildenafil Quetiapine Alprostadil Warfarin Bupropion Tigas PeniS Co, AyaW Bumaba!
Can cause nightmares
mirtazapine (tetracyclic antidepressant)
Used in smoking cessation. MOA?
Bupropion
Inhibits neuronal reuptake of dopamine and NE.
Can cause hypertensive crisis when taken with tyramine.
Phenelzine. MAO type a and b inhibitor.
Tx for serotonin syndrome
Antiseizure drugs, muscle relaxants, serotonin blockers (cryptoheptadine)
Opioid with shortest halflife? Longest?
Remifentanil 3-4 mins
Buprenorphine 4-8 hours
Opioid receptor for inhibition of respiration
mu. Greater affinity for endorphins
Opioid receptor for development of tolerance
delta
Greater affinity for enkephalins
Opioid receptor for slowed gastrointestinal transit
Kappa
Greater affinity for dynorphins
Opioid side effects
ARMED Chinese Analgesia Respiratory depression Miosis Euphoria Drowsiness Constipation
Most potent opioid
Ohmefentanyl
Opioid that exerts hemodynamic effects on pulmonary circulation
Morphine
Full agonist opioids
Morphine
Fentanyl
Meperidine
Methadone
Strong agonist at mu and kappa receptors. Used in labor analgesia
Meperidine
Used in opioid dependence and opioid withdrawal
Methadone
Opioids: Partial agonists
Hydrocodone
Oxycodone
Dextromethorphan
Codeine
Opioid for cough suppression
Dexteomethorphan
Reduces craving in alcohol dependence
Nalbuphine
Naltrexone
Opioid antagonist
Naloxone
Naltrexone
Nalmefene
Opioid overdose triad
Pupillary constriction
Comatose state
Respiratory depression
Street name for methylene dioxymetamphetamine MDMA
Ecstasy
MDMA overdose presentation
Severe hypertension Hyperthermia Delirium Psychomotor agitation Profound hyponatremia
Cocaine overdose presentation
Mydriasis, vasoconstriction, thrombus formation, psychomotor agitation, severe hyperthermia, crack lung (hemorrhagic alveolitis)
Angel dust
Phencyclidine
Special K
Ketamine
Hallucinogenic agents
Lysergic acid diethylamide
Mescaline
Psilocybin
Partially purified cannabis sativa, more potent form
Hashish