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GoT of bipolar disorder Tx
- decrease severity, frequency, and duration of episodes
- promote regular sleep and activity
- decrease negative s/s of episodes
- decrease functional impairment
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DSM classification of bipolar disorder
- 1. bipolar disorder I
- a. M=F
- b. 1+ manic or mixed episodes (usually with major depressive disorder)
- 2. bipolar disorder II
- a. F>M
- b. 1+ MDE and 1+ hypomanic episodes
- 3. cyclothymic disorder
- a. 2 years of repeated hypomanic and depressive s/s
4. bipolar disorder not otherwise specified
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S/S of bipolar disorder
- acute mania±psychoses
- bipolar depression (2x compared to mania)
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Summary of bipolar disorder Tx
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Acute Tx of mania/mixed episode of bipolar disorder
- first line: Li or VPA ± SGA ± BDZ
- second line: CBZ, OXC, Li+VPA
- *(avoid CBZ+OLZ)
third line: haloperidol, Li+CBZ, CLZ
- for mixed: VPA>Li, OLZ>Li
- refractory: 2MS+SGA, CLZ, ECT
- *d/c antidepressant (taper is possible)
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Acute treatment of bipolar depression
- first line: Li, LTG, QTP, OLZ+SSRI, Li/VPA+SSRI/bupropion
- second line: QTP+SSRI, adjunctive modafinil
- *avoid ARI monotherapy
- *avoid antidepressant monotherapy
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Indications for bipolar disorder maintenance Tx
- >2 major episodes
- 1 severe episodes
- rapid onset of S/S
- frequent attacks (>1/yr)
- family history
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Maintenance Tx of bipolar disorder
first line: Li, VPA, LTG, OLZ
- growing evidence for:
- 1. QTP as a monotherapy/adjunct for manic/depressive prophylaxis
- 2. RIS, ARI, ZIP for manic prophylaxis
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Mood stabilizers' doses and onset of action
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Acute s/e of lithium
- cognitive dysfunction
- lethargy
- hand tremor (tolerated)
- GI upset (tolerated)
- polydipsia
- polyuria
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Chronic s/e of lithium
- cardiac effects (T-wave depression)
- diabetes insipidus
- glomerular dysfunction
- hypothyroidism (not dose-related)
- weight gain
- leukocytosis (benign, reversible)
- acne
- psoriasis
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Serum range of lithium
through (after 8-12hours)= 0.8-1.1mmol/L (0.4-0.7mmol/L in elderly)
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Lithium toxicity s/s
- mild: cognitive dysfunction, fine tremor, GI s/s, weakness, fatigue
- moderate: confusion, lethargy, ataxia, dysarthria, nystagmus, vomiting, coarse tremor
- severe: seizure, myoclonus, brain damage, coma
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Monitoring parameters for lithium
- electrolytes (dehydration= increased lithium levels)
- CBC: increased WBC
- SrCr/BUN
- TSH/T4
- weight
- pregnancy test
- urinalysis: lithium inhibits ADH-->SIADH
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Serum range of VPA
300-700uM
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S/E of VPA
- sedation
- ataxia
- N/V
- epigastric cramping
- fine hand tremor
- throbocytopenia
- increase LFTs
- pancreatitis
- weight gain
- alopecia
- polycystic ovarian syndrome (amenorrhea, anovulation)
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Monitoring parameters for VPA
- CBC: increased WBC, decreased platelets
- weight
- pregnancy test
- DI (inhibit metabolism)
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Serum range of CBZ
17-50uM
*avoid combining with VPA or OLZ
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Rare S/E of CBZ
- hepatotoxicity
- hyponatremia
- agranulocytosis (severe leukopenia)
- aplastic anemia
- rash: SJS, toxic epidermal necrolysis
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DI of CBZ
erythromycin, fluoxetine, fluvoxamine, cimetidine, ketoconazole= decrease CBZ Cl
CBZ induction: anticonvulsants, antidepressants, BDZs, warfarin, OCs
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LTG doses for bipolar disorder Tx
LTG 25mg/d-->200mg/d
- *use lower doses with VPA
- *use higher doses with CBZ
- *slow increase dose by 25mg/d q2weeks= decrease risk of rash
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S/E of LTG
rash (10%) within 6-8weeks
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Risk factors of LTG-induced rash
- high dose
- fast tiration
- concurrent VPA
- children
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Role of SGA in bipolar disorder
- 1. acute mania
- a. effective as adjuncts to lithium/VPA OR as monotherapy
- b. clozapine in refractory/rapid cyclers
- 2. bipolar depression
- a. OLZ and QTP= LTG
- 3. bipolar maintenance
- a. limited data for OLZ or QTP
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How pharmacist can help with bipolar disorder?
- adherence
- regular sleep
- education about medications and bipolar disorder
- monitoring efficacy and s/e
- early recognition of s/s
- act as resources
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