Bipolar Disorder Flashcards
(40 cards)
Manic Episode criteria: Need how many?
3 or more, 4 if irritability is the only feature. 1 week OR hospitalization
Hypomanic episode criteria: Need how many and for how many days?
3 or more. 4 if irritability is the only feature. 4 consecutive days. Needs to be observable by others.
Catatonia as a specifier
Need 3 of: posturing, gmannerism, sterotypy, agitation not influenced by external stimuli. grimacing, echolalia, echopraxia.
Cyclothymic Disorder
2 years. Symptoms present at least half the time and patient has not been without symptoms for more than 2 months at a time.
Primary Mania vs Secondary Mania
Primary mania is early onset, no obvious medical cause, high family history of bipolar disorder, and good response to lithium. Mania secondary to meds will have a poor response to lithium.
Rapid cycling, what counts?
All mood including manic, hypomanic, AND depressed
How does lithium ultimately work?
Has effects on second messengers and gene expression. Slows down signal transduction in neurons.
Inhibits inositol monophosphatase.
Meds with bipolar depression indications
Symbyax, quetiapine, latuda. NO lamictal.
Latuda is only SGA that is not approved for
mania
Which antidepressant is least likely to switch?
wellbutrin
Lithium is least helpful in
mixed states. Instead use valproic acid, tegretol, geodon, abilify, or asenapine.
Lithium and end of pregnancy
Prior to delivery, decrease dose to half or stop temporarily. Neonatal toxicity is floppy baby syndrome (cyanosis, hypotonicity ) from exposure during labor. `
Valproate dosing
20 mg/kg to load, then start at 750. Target blood level is 90.
Symptoms of hepatotoxicity from depakote
Malaise, weakness, lethargy, facial edema, anorexia, vomiting. The LFTs aren’t super helpful . May see hyperammonemia.
Depakote causing pancreatic adverse effects
VPA-caused pancreatitis may occur. Can get hemorrhagic, quickly leading to death.
Depakote and PCOS
4-10% of pts on VPA get it within 1 year
Depakote and OCP
Depakote interacts with OCP to lower the level, making pregnancy more likely.
Tegretol and Asian Patients
You MUST get genetic testing for HLA B1502, as that is associated with SJS
Lamictal risk of SJS
1/1000 with rapid titration, 1/6000 with slow titration. Target dose is 200-400 mg. Risk increases beyond that.
What type of therapy is good for bipolar?
Social rhythm therapy
Lithium induced Nephrogenic DI
Lithium-induced nephrogenic diabetes insipidus is usually a self-limiting condition in which there is a down-regulation of channel aquaporin-2 in the luminal wall of the cell’s surface, leading to decreased urine osmolality and increased urine volume (polyuria). ADH levels are adequate or even high, but its action on the V2 receptor is defective. V1-receptor is located in the vascular smooth muscles and is involved in total peripheral resistance regulation.
Mechanism of action of depakote
Blocks GABA transaminase, increasing synaptic levels of GABA.
What is cyclothymic disorder?
Cyclothymic disorder requires over 2 years the presence of numerous periods of both hypomanic symptoms and depressive symptoms not meeting criteria for manic or hypomanic episodes or for major depressive disorder, with symptom-free periods no longer than 2 months.
What teratogenic effects does carbamazepine have on the fetus?
Craniofacial abnormalities.