Psychotropic medications Flashcards
Examples of SSRIs
Citalopram, Escitalopram, Sertraline, Fluoxetine, Fluvoxamine, Paroxetine
Contraindications/precautions to SSRIs
High bleeding risk, high risk for angle-closure glaucoma, bipolar disorder, concurrent treatment with other antidepressants (especially MAOIs)
Safety of SSRIs in pregnancy and breastfeeding
Category C in pregnancy - DON’T USE (use in 3rd trimester may also cause withdrawal in newborn)
Considered safe in breastfeeding, especially sertraline due to low levels in breast milk - potential drowsiness and irritability in newborn
Side effects of SSRIs
SSRI:
Serotonin syndrome
Stimulate CNS (tremor, headache, agitation)
Reproductive dysfunction (reduced libido, impotence)
Insomnia
+ GIT (nausea, diarrhoea)
Significant: hepatitis, increased QT interval, SIADH, abnormal platelet aggregation, acute angle-closure (esp paroxetine), EPS
Zoloft generic name
Sertraline
Lexapro generic name
Escitalopram
Prozac generic name
Fluoxetine
Indications for SSRIs
Major depression
Anxiety disorders (Panic disorder, OCD)
Bulimia nervosa
Premenstrual dysphoric disorder
Indications for SNRIs
Major depression
duloxetine also indicated in general anxiety disorder and second line in painful diabetic peripheral neuropathy
Contraindications/precautions of SNRIs
CrCl less than 30 (reduced dose) Hepatic impairment Bipolar Epilepsy/increased risk of seizures High bleeding risk High risk of angle-closure High risk of overdose (esp avoid venlafaxine)
Safety of SNRIs in pregnancy and breastfeeding
Category B2 - limited studies, use in 3rdT can cause withdrawal in newborns
Low concentrations in breast milk, monitor baby for sedation and FTT, consider using alternative to duloxetine until more data
Side effects of SNRIs
Common: Nausea, constipation, dry mouth, sexual dysfunction, sweating, dizziness, headache, reduced appetite, rash
Significant: seizures, myositis, Takotsubo, SIADH, orthostatic hypotension, urinary retention (duloxetine), Steven-Johnson, increased bleeding
Monitoring patient on SNRI
Check baseline BP and regularly after commencement for rise
Baseline Na then monitoring soon after commencement especially at risk patients(e.g. elderly)
Monitor frequently and carefully early in treatment for suicidal thoughts and behaviours
Monitoring patient on SSRI
Baseline sodium and soon after starting treatment if risk of hypoNa e.g. elderly
Monitor frequently early in treatment for suicidal thoughts and behaviours
Indications for mirtazapine
Major depression, especially useful where insomnia or anorexia are prominent features
Mechanism of action of mirtazapine
Blocks post-synaptic serotonin receptors and presynaptic alpha-adrenergic receptors
Also a potent H1 antagonist (causes sedation)
Contraindications/precautions to use of mirtazapine
Treatment with, or within 14 days of stopping, a MAOI
Epilepsy/increased risk of seizures
Phenylketonuria
Bipolar
Drug class of mirtazapine
Serotonin noradrenaline disinhibitor
Side effects of mirtazapine
Common: increased appetite, weight gain, sedation, weakness, peripheral oedema
Significant:
Mania, seizures, agranulocytosis, granulocytopaenia
Dosing of mirtazapine
Initial dose 15mg nocte - increase to 30-45mg nocte as indicated
Max. dose 60mg nocte
Withdraw over at least 1-2 weeks to minimise withdrawal symptoms
Indications for monoamine oxidase inhibitors
Major depression (third line) Some anxiety disorders, including phobic disorders and panic disorders
Examples of SNRIs
Venlafaxine, desvenlafaxine, duloxetine
Generic name of Efexor
Venlafaxine
Generic name of Pristiq
Desvenlafaxine
Generic name of Cymbalta
Duloxetine
Examples of MAOIs
Phenelzine
Tranylcypromine
Moclobemide - selective for type A (second line)
Mechanism of action of MAOIs
IRREVERSIBLE inhibition of monoamine oxidase A and/or B - increased synaptic concentrations of adrenaline, noradrenaline, dopamine and serotonin
Contraindications/precautions to using MAOIs
Catecholamine-secreting tumours (e.g. phaeochromocytoma)
Cerebrovascular or cardiovascular disease
Angina/CAD (may reduce pain associated with MI)
Epilepsy/high risk of seizures
Bipolar
Diabetes (may reduce BGL)
Significant liver disease
Safety of MAOIs in pregnancy and breastfeeding
Category B2/3 - avoid in pregnancy until more data
Moclobemide appears safe in breastfeeding, limited data for other MAOIs
Side effects of MAOIs
Common: Orthostatic hypotension, sleep disturbance, headache, drowsiness, weakness, myoclonus, agitation, tremors/twitching, sexual dysfunction (less likely with moclobemide), nausea, diarrhoea/constipation
Significant: hypertensive crisis (usually precipitated by tyramine or med interactions), SIADH, hepatic damage, blurred vision