click below
click below
Normal Size Small Size show me how
Antidepressants
Tox Test 4
Question | Answer |
---|---|
What are symptoms of depression? | sadness, depressed mood, inactivity, loss of interest or pleasure, reduced ability to enjoy life, sleep disturbances |
What are some treatments for depression? | pharmaceuticals, psychotherapy, electroconvulsive therapy |
What is the mechanism of action for antidepressants? | mechanism is unclear, believed to involve reuptake inhibition of serotonin and norepinephrine |
What are some first generation antidepressants? | TCAs, monoamine oxidase inhibitors (MAOIs) |
When are MAOIs used? | when people are allergic/unresponsive to TCAs |
What is the mechanism of action for first generation antidepressants? | affect seratonin and norepinephrine reuptake |
What are the side effects of TCAs and MAOIs? | block a1: hypotension, dizziness, sedation block H1: weight gain, sedation block M1: dry mouth, blurred vision, constipation, urinary retention |
What is the mechanism of action for selective serotonin reuptake inhibitors? | inhibit serotonin reuptake without side effects of TCAs and MAOIs |
Wht are the side effects of SSRIs? | anxiety, sleep disturbances, sexual dysfunction |
What are some third generation antidepressants? | venlafaxine, mirtazapine, nefazodone |
What is the mechanism of action for venlafaxine? | blocks serotonin and NE reuptake, also a weak inhibitor of dopamine |
What is the mechanism of action for mirtazapine? | a2 antagonist, 5-HT2 antagonist, 5-HT3 antagonist |
What are th side effects of mirtazapine? | weight gain and sedation |
What is the metabolism of third generation antidepressants? | lipophillic and well-absorbed, undergo heavy 1st pass metabolism. Most metabolize by hydroxylayion and demethylation |
How do antipsychotics work? | They do not eliminate th fundamental thinking disorder, but they permit the patient to function in a supportive environment. |
What are the symptoms of schizophrenia? | delusions, hallucinations, disorganized speech, catatonic behavior, los of ability to speak, lack of will, lack of emotional expression |
What are some typical antipsychotics? | phenothiazines, thioxanthines, dibenzoxapines, butyrophenones, benzamides |
What are some atypical antipsychotics? | clozapine, olanzapine, quetiapine, aripiprazole |
What is the mechanism of action for antipsychotics? | block DA receptors in brain and periphery. They are antagonized by drugs that raise DA levels. Also inhibit 5-HT receptors |
What are the effects of antipsychotics? | reduce spontaneous physical movement, do not depress intellectual/motor function, may cause sedation. Usually takes several weeks to see results. |
What are the extrapyramidal effects of antipsychotics? | parkinsonian symptoms, motor restlessness, tardive dyskinesia. Co-administration of benztropine can reduce effects. |
What are the adverse effects of antipsychotics? | parkinsonian symptoms, drowsiness, confusion, dry mouth, urinary retention, sexual dysfunction, constipation. May aggravate EtOH withdrawal, epilepsy |