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Winter Therapeutics Exam #3 - Bipolar Disorder
n/a
45
Health Care
Graduate
02/04/2010

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Term
lithium (Eskalith)
Definition
mood-stablizing agent
Indications:
mania associated with bipolar disorder (first line)
MoA: alters cation transport, influences NE & 5-HT reuptake
Dose: 900-2400 mg/day in 3-4 divided doses OR 900-1800 mg/day q12 hrs (ER)
Serum Monitoring:
Acute Mania - 0.6-1.2 mEq/L
Maintenance - 0.8-1 mEq/L
Elderly - 0.6-0.8 mEq/L
Lab Monitoring:
Baseline: thyroid fcn, renal fcn, CBC, electrolytes, weight, EKG, pregnancy test
Follow up: renal & thyroid fcn, weight, CBC monthly for 1st 3 months then every 6-12 months
ADRs:
GI, somnolence, fatigue, WEIGHT GAIN, polyuria/polydipsia, NEPHROGENIC DIABETES INSIPIDUS, HYPOTHYROIDISM, TREMOR (decrease dose, switch to ER, and/or add a beta blocker)
Pregancy Cat. D - Epstein's Anomaly (1st trimester - displaced tricuspid valve allows blood flow back into right atrium)
Term
valproate (Depakote, Depakote ER, Depakote Sprinkle, Depacon, Depakene)
Definition
Indication: mania associated w/ bipolar (1st line); DRUG OF CHOICE: rapid cycling or mixed episodes;
MoA: increases availability of GABA;
Dose: Initial - 500-750 mg/day in divided doses, MAX dose = 60 mg/kg/day
Serum Monitoring:
Min. conc. = 60-70 mcg/ml, Upper limit: 125 mcg/ml
Monitoring Parameters:
Baseline - Chem-7, LFTs, CBC, weight, pregnancy test; Follow up - serum drug levels, LFTs, weight, CBC, amylase, lipase
ADRs:
somnolence, dizziness, TREMOR, MILD THROMBOCYTOPENIA, WEIGHT GAIN, mild hepatotoxicity (BLACK BOX WARNING), ALOPECIA, PANCREATITIS (Black Box Warning);
Toxicity:
occurs >200 mcg/mL, symptoms - visual hallucinations, deep sleep, coma, motor restlessness, new onset tremor
Drug Interactions:
Lamotrigine - decreases levels, drug may increase lamotrigine levels;
Warfarin - increases INR
Pregnancy class D
Term
lamotrigine (Lamictal)
Definition
FDA indication: maintenance therapy w/ bipolar disorder (mainly bipolar II)
Dosing:
Initial: 25 mg/day for 2 wks, increase to 50 mg/day for 2 wks, then increase to 100 mg/day for 1 wk
Max dose: 500 mg/day
Cut dosing schedule in half if also on VPA --> increased risk of SJS
Term
carbamazepine (Tegretol, Tegretol XR, Equetro)
Definition
Equetro only - acute manic & mixed episodes w/ Bipolar I;
DRUG of CHOICE: given to pts who fail Li and/or VPA
Dose:
Initial: 200 mg BID, increased in 200 mg increments based on symptoms
Serum Monitoring (every 6-12 months):
Optimal - 8-12 mcg/ml
>15 mcg/ml = ataxia, seizures, coma
PK:
Induces 1A2, 3A4, 2C9/10, 2D6
Autoinduction occurs
Monitoring Paramaters:
Baseline - CBC, electrolytes, LFTs, EKG
Follow up - LFTs, CBC every 3-6 months
ADRs:
blurry or double vision, confusion, N/V, diarrhea, dyspepsia, leukopenia, hepatotoxicity, hyponatremia w/ SIADH, BLACK BOX WARNINGs: agranulocytosis, aplastic anemia
Drug Interactions:
CYP3A4 inhbitors --> increase levels
VPA inhibits degradation of drug
Drug induces metabolism of VPA
Neurotoxicity with drug & Li
Pregnancy Cat. D
Term
risperidone (Rispderdal, Risperdal Consta)
Definition
SGA used to tx:
schizophrenia
acute manic/mixed episodes of bipolar (adults & children)
irritability/aggression associated with autism
DEPOT INJECTION:
adjunctive or monotherapy for maintenance of bipolar
Term
olanzapine (Zyprexis)
Definition
FDA indications:
schizophrenia
acute manic/mixed episodes
maintenance tx of bipolar
acute agitation
depressive episodes when used with fluoxetine
Term
quetiapine (Seroquel)
Definition
FDA indications:
schizophrenia
acute manic/mixed episodes
depressive episodes
adjunctive agent for maintenance of bipolar
Term
ziprasidone (Geodon)
Definition
FDA indications:
schizophrenia
acute manic/mixed episoded of bipolar
acute agitation
Term
aripiprazole (Abilify)
Definition
FDA indications:
schizophrenia
maintenance therapy of bipolar
manic/mixed episodes of bipolar (CHILDReN & ADULTS)
acute agitation
adjunctive for major depressive disorder
Term
Bipolar I Disorder
Definition
hx of manic or mixed episodes, major depressive episodes are typical but NOT REQUIRED
Term
Bipolar II Disorder
Definition
one or more episodes of hypomania & a hx of depressive episodes
Term
Cyclothymic Disorder
Definition
for at least 2 yrs, with NO symptom-free period of > 2 months, presence of numerous periods of hypomania & depressive symptoms
Term
Bipolar Disorder NOS
Definition
manic symptoms present but pt does not meet criteria for bipolar I, bipolar II, or cyclothymic disorder
Term
Medical Disorders associated with Mania
Definition
hyper/hypothyroidism, CNS disorders, infections
Term
Medications associated with Mania
Definition
alcohol intoxication, antidepressants, steroids, weight loss agents, St. John's wort, xanthines
Term
Signs & Symptoms of Bipolar Disorder
Definition
characterized by dramatic changes in behavior: euphoric highs ("mania") to depressive lows; Onset: dramatic mood swings and/or extreme alterations in energy levels & behaviors; NOT ALL PTS experience it the same
Term
DSM-IV-TR Criteria for Major Depressive Episode of Bipolar Disorder
Definition
5 or more of following symptoms present nearly every day for > 2 wks; at least 1 of symptoms is depressed mood or loss of interest:
depressed, sad mood
decreased interest & pleasure in normal activities
decreased weight loss, appetite
insomnia
psychomotor retardation or agitation
fatigue, loss of energy
feelings of guilt or worthlessness
suicidal thoughts or attempts
Term
DSM-IV-TR Criteria for Manic Episodes of Bipolar Disorder
Definition
3 of following symptoms >1 wk period of abnormally & persistently elevated, expansive or irritable mood:
inflated self-esteem, grandiosity
decreased need for sleep
pressured speech
flight of ideas
distractible
increase in goal-directed activity
excessive involvement in pleasurable activities
Term
DSM-IV-TR Criteria for Hypomanic Episode of Bipolar Disorder
Definition
At least 4 days of elevated, expansive or irritable mood; associated with at least 3 of following:
inflated self esteem
decreased need for sleep
pressured speech
racing thoughts
increase in goal-directed activity
excessive involvment in pleasurable activities
Term
DSM-IV-TR Criteria for Mixed Episode for Bipolar Disorder
Definition
criteria met for both manic & depressive episodes nearly every day during a one week time frame
Term
DSM-IV-TR Criteria for Rapid Cycling in Bipolar Disorder
Definition
>4 major depressive or manic epidodes in 12 months
Term
Goals of Bipolar Treatment
Definition
resolve or shorten duration of acute manic, hypomanic, or depressive episode; prevent future episodes; *MAXIMIZE COMPLIANCE with THERAPY*; minimize adverse effects; treat comorbid substance use & abuse; avoidance of stressors that may precipitates acute episode
Term
Drugs that increase Li levels
Definition
NSAIDs, ACE-Is/ARBs, diuretics
Term
drugs that decrease Li levels
Definition
caffeine, theophylline
Term
Mild Toxic Li Levels
Definition
1.5 mEq/L-2 mEq/L; impaired memory & concentration; fine hand tremor; N/V; fatigue; muscle weakness
Term
Moderate Li Toxicity
Definition
2 mEq/L - 2.5 mEq/L; worsening tremor; altered mental status; increased deep tendon reflexes
Term
Severe Li Toxicity
Definition
>2.5 mEq/L; seizures; coma; respiratory depression; arrhythmias; CV collapse; death
Term
oxcarbazepine (Trileptal)
Definition
NOT FDA indicated but still used for bipolar disorder;
2nd-line tx for acute mania & depression associated w/ bipolar disorder
SEs: hyponatremia w/ SIADH
Term
gabapentin (Neurontin)
Definition
drug that failed to improve symptoms of acute mania in trials
NOT RECOMMENDED for monotherapy of acute mania
Term
Drugs for Tx of Acute Manic/Mixed Episodes
Definition
risperidone (Risperdal), olanzapine (Zyprexa), quietapine (Seroquel), ziprasidone (Geodon), aripiprazole (Abilify), asenapine (Saphris)
Term
Drugs for Maintenance of Bipolar Disorder
Definition
risperidone consta (Risperdal Consta), olanzapine (Zyprexa), quietapine (Seroquel), aripiprazole (Abilify)
Term
Drugs for Tx of Depressive Episodes
Definition
olanzapine w/ fluoxetine; quietapine (Seroquel)
Term
Antidepressants
Definition
drugs that should not be added until pt's primary medication dosing has decreased or eleminated symptoms of mania or hypomania
Term
SSRIs
Definition
limited evidence for use in bipolar;
if added, must be used with an antimanic agent to prevent bipolar switch
Term
MAOIs
Definition
antidepressants found to be effective for tx of bipolar depression but due to safety concerns, other therapies should be considered first
Term
TCAs
Definition
antidepressants effective for treating bipolar depression despite their SE disadvantages
Term
benzodiazepines
Definition
lorazepam & clonazepam are preferred agents, useful as adjunctive tx for acute mania; should be tapered & D/C'd once pt is stable
Term
Tx for Severe Manic or Mixed Episodes
Definition
1) Lithium + antipsychotic OR
2) valproate + antipsychotic
3) Antidepressants tapered & D/C'd if possible
4) Psychosocial therapy
Term
Tx for Less Ill Manic Pts (Mild/Moderate)
Definition
1) Lithium monotherapy OR
2) valproate monotherapy
3) SGAs (IM injection) - olanzapine or risperidone
4) Antidepressants tapered & D/C'd if possible
5) Psychosocial therapy
Term
First Line Tx Failure in Pts w/ Acute Mania
Definition
1) If pt fails 1st line med, add another 1st line med
2) add carbamazepine OR oxcarbazepine OR
3) add antipsychotic
4) clozapine may be effective in refractory illness
Term
First line Tx for Bipolar Depressive Episodes
Definition
1) Lithium OR
2) lamotrigine OR
3) divalproex
4) Antidepressant tx only used in severe depression with a mood stabilizzer
5) preferred antidepressants: venlafaxine, SSRIs
Term
First line Tx Failure for Pts with Depressive Episodes in Bipolar pts
Definition
1) ADD lamotrigine OR
2) Add paroxetine OR
3) switch SSRI or venlafaxine
Term
Treatment Guidelines for Maintenance Tx of Bipolar Disorder
Definition
1) Lithium
2) Valproate
3) Alternative - lamotrigine OR carbamazapine OR oxcarbazepine
4) antipsychotics - should be D/C'd
Term
Tx Guidelines for Rapid Cycling
Definition
1) identify & tx medical conditions that may contribute to problem
2) Taper & D/C antidepressants
3) Initial Tx: lithium OR valproate
4) Alternative: lamotrigine OR carbamazepine
5) Combo therapy often required: manic patient - add 2nd mood stablizer; depressed pt - add 2nd mood stabilizer , stop antidepressant
6) Add SGA if needed
Term
Tips for Pts with Bipolar Disorder
Definition
1) seek tx as soon as you notice episodes
2) avoid drug & alcohol use
3) maintain regular sleep patterns
4) take all meds & stay on meds even when feeling well
5) seek advice prior to taking any OTC meds
6) Establish support system
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