Psychopharmacy Flashcards
Indications for Antidepressants? (7)
Unipolar and Bipolar Depression
Organic Mood Disorders
Schzioaffective Disorder
Anxiety Disorder
PTSD
Phobia
Premenstrual Dysphoric Disorder
What is the delay after therapeutic dose of antidepressants has been reached?
2-4 Weeks
How long should you give antidepressants to work?
2 Months at least
Tricyclics Side Effects (5)
Antihistaminic
Anticholinergic
Antiadrenergic
Lethal in Overdose
Can cause QT Lengthening
Name 4 Tertiary TCA’s?
Impiramine
Amitryptyline
Doxepin
Clomipramine
Name 2 Secondary TCA’s?
Desipramine and Notriptyline
What do Secondary TCA’s do?
Primarily block noradrenaline
Side Effects of Secondary TCA’s?
Antihistaminic
Anticholinergic
Antiadrenergic
Lethal in Overdose
Can cause QT Lengthening
Action of Monoamine Oxidase Inhibitors?
Bind to monoamine oxidase thereby preventing inactivation of amines such as Norepinephrine, Dopamine and Serotonin = Increased Synaptic Levels
Monoamine Oxidase Inhibitors are very effective for?
Resistant Depression
Monoamine Oxidase Inhibitors Side Effects? (5)
- Orthostatic Hypotension
- Weight Gain
- Sedation
- Sexual Dysfunction
- Sleep Disturbance
Hypertensive Crisis can develop with what psychiatric medication?
MAOI’s taken with Tyramine Rich Foods or Sympathomimetics
MAOI’s taken with what can cause Hypertensive Crisis?
Tyramine Rich Foods or Sympathomimetics
Serotonin Syndrome can develop if take MAOI with?
Meds that contain Serotonin or have Sympathomimetic Actions
Serotonin Syndrome Symptoms? (6)
Abdo Pain Diarrhoea Sweats Tachycardia Myoclonus Irritability Delirium
Serotonin Syndrome can lead to? (3)
Hyppyrexia
Cardiovascular Shock
Death
How to avoid Serotonin Syndrome? (2)
Wait 2 weeks before switching from SSRI to MAOI
How long to wait from switching from Fluoxetine to MAOI?
5 Weeks
What do selective serotonin reuptake inhibitors (SSRIs) do?
Block presynaptic serotonin reuptake
What do SSRI’s treat?
Treat Anxiety and Depressive Symptoms
Side Effects of SSRI’s? (6)
GI Upset Sexual Dysfunction Anxiety Insomnia Fatigue Dizzy
Activation Syndrome is caused by?
Increased Serotonin
Symptoms of Activation Syndrome (4)
Nausea
Increased Anxiety
Panic
Agitation
Length of Activation syndrome
2-10 Days
Symptoms of Discontinuation Syndrome? (4)
Agitation
Nausea
Disequilibrium
Dysphoria
If a patient gets discontinuation syndrome what should you consider switching to?
Fluoxetine
Sertraline Pros? (4)
Very Weak P450 Interactions
Short Half Life
Lower Build up of Metabolites
Less Sedating when Compared to Paroxietine
Sertraline Cons? (2)
Max Absorption requires full stomach
Increases number of GI adverse drug reactions
Fluoxetine is also known as?
Prozac
Fluoxetine Pros? (3)
Long Half Life
Good for Patients with Medication Noncompliance Issues
May provide Increased Energy
How to taper someone off SSRI when trying to prevent SSRI Discontinuation Syndrome?
Give 20mg Fluoxetine
Cons of Fluoxetine
Active Metabolite may build up
Significant P450 Interactions
Initial activation = Anxiety and Insomnia
Can Induce Mania
Fluoxetine is not a good choice in what type of Gi patient?
Hepatic illness
SNRI Action?
Inhibit both serotonin and noraadrenergic reuptake but without the bad side effects
SNRI uses? (3)
Depression
Anxiety
Neuropathic
Venlafaxine is a type of what drug?
SNRI
Duloxetine is a type of what drug?
SNRI
Venlafaxine Pros?
Minimal Interactions
Almost no P450 Activity
Short Half Life
Fast Renal Clearance
Venlafaxine is good for what population?
Geriatrics
Cons of Venlafaxine? (5)
Can cause 10-15mmHg dose Dependent increase in a diastolic BP
May Cause significant nausea
Can cause Discontinuation Syndrome
QT Prolongation
Sexual Side Effects
Venlafaxine can cause what increase in bp?
10-15mmHg dose dependent diastolic bp
Venlafaxine can cause what syndrome?
Discontinuation
Duloxetine cons? (3)
CYP2DS and CYPA1A Inhibitor
Cannot break capsule as active ingredient not stable within stomach
Higher drop out rate
What types of SSRI are least sedating?
Citalopram
Fluxoetine
Sertraline
What psychiatric tablets are sedative/weight gain
Paroxetine
Mirtazepine
Novel Antidepressants Pros? (2)
5HT2 and 5HT3 Receptor Antagonist
Can be used as Hypnotic at Lower Dose
Novel Antidepressants Cons (2)
Increased Serum Cholesterol by 20% and Triglycerides in 6%
Very Sedating at Lower Doses
Novel Antidepressants: At what dose can become activating and needing change of admin time?
30mg +
Novel Antidepressants at doses below 45mg are associated with?
Weight Gain
Indications for Mood Stabilisers (3)
Bipolar
Cyclothymia
Schizoaffective
Three Classes of Mood Stabilisers?
Lithium
Anticonvulsants
Antipsychotics
Which medication is the only medication to reduce suicide rate?
Lithium
Rate of Completed Suicide in BAD is?
15%
Lithium is effective in long term prophylaxis of?
Mania and Depressive Episodes in 70% of BAD
Factors that predict positive response to lithium? (3)
Prior Long Term Response or Family Member with Good Response
Pure Mania
Mania followed by Depression
Before starting Lithium bloods to do (3)
Baseline U+E
TSH
Pregnancy Test
Pregnancy and Lithium are associated with what anomaly?
Ebstein’s
Ebstein’s is associated with what risk in first trimester with lithium use?
20x greater risk
Steady State is achieved after how many days with lithium use?
5 Days
Check steady state how many hours after last dose?
12
How to check steady state, TSH and creatinine long term into lithium use?
Steady State 3 Months
TSH and Creatinine 6 months
Goal blood level with lithium?
0.6 and 1.2
Side Effects of Lithium use? (7)
GI Distress Thyroid Abnormalities Nonsignificant Leukocytosis Polyuria/Polydyspia Interstitial Renal Fibrosis Hair Loss Reduces Seizure Threshold
More common side effects of lithium?
GI Distress
Polyuria/Polydypsia as a side effect to lithium can be caused secondary to what?
ADH Antagonism