Mood Stabilizers Flashcards
Which class of over the counter drug can decrease lithium excretion and thereby increase lithium concentrations?
NSAIDS (except sulindac and aspirin)
What are the indications for lithium?
- Acute mania
- Bipolar maintenance
What mood stabilizer is demonstrated to reduce suicidality?
Li+
What mood stabilizer has proven to be effective prophylaxis in majority of bipolar patients?
Li+
What is Li+ less effective in treating?
Less effective in rapid cycling or mixed bipolar states
What baseline labs need to be done before starting Li+?
Get baseline Creatinine, BUN, TSH, and CBC ( every 6 months)
What teratogenic effect may Li+ have?
First trimester associated with Ebstein’s anomaly (RV hypoplasia & Tricuspid insufficiency)
What are the major side effects of Li+?
- Diarrhea, irritability, fine tremor, weight gain, nausea, hair loss, acne
- Nephrogenic DI (polyuria/polydipsia) secondary to ADH antagonism
- Coarse tremor, gait instability, vomiting, diarrhea, confusion, cognitive slowing, seizures, oliguria, and renal failure
- Alopecia
- Metallic taste
- Women are at greater risk of thyroid dysfunction secondary to Li+
What conditions can increase the risk of Li+ toxicity?
Increased risk of toxicity with:
- Fluid or salt restriction
- Hot weather/sweating
- Use of anti-inflammatory drugs (except Aspirin)
- ACE-I/ARBs
- Thiazide diuretics
In what ways is valproic acid more effective than Li+?
- More effective than lithium in rapid cycling & mixed states
- Can treat aggression and impulsivity in other psychiatric disorders
In what ways is valproic acid not as effective as Li+?
- As effective as Lithium in mania prophylaxis but is not as effective in depression prophylaxis.
What baseline tests should be taken before starting valproic acid?
Before med is started: baseline liver function tests (LFT), pregnancy test, and CBC
When is steady state achieved for Li+ , Carbamazepine, and Valproic acid and what should be done after it is achieved?
- Steady state achieved after 4-5 days
- Valproic Acid => check 12 hours after last dose and repeat CBC and LFTs
- Lithium => check TSH and Creatinine
- Carbamazepine => CBC and LFTs
What are the target blood levels for Li+, Carbamazepine, and Valproic acid?
Lithium : 0.8-1.2
Carbamazepine: 8-12
Valproic Acid: 80-120
What are the major side effects of Valproic Acid?
- Nausea, weight gain, sedation, unsteadiness (ataxia), hair loss, tremor
- Liver dysfunction/hepatic failure, decreased platelets (thrombocytopenia)
- Acute pancreatitis
- Hyperammonemia
- Neural tube defects