Depression & ADHD Flashcards
Diagnostics for Major Depressive Episode:
- prolonged & cause SIGNIFICANT distress/dysfunction
- incl. depressed mood or anhedonia
What are the common Fx’s of a Major Depressive Episode (MDE)?
Depressed most of the day, Anhedonia, Weight Change, Sleep Disturbance etc.
- diagnosed when a change from baseline & sustained for 2 weeks or longer
What is the prevalence of major depression?
Yearly prevalence ~ 6-7%
Lifetime prevalence of about 16%, almost 1 in 6
leading cause of disability worldwide
What is the Neuropathology & Neuroimaging of Depression?
- small reduction in hippocampal size
- increased activation of the amygdala by (-) stimuli
- reduced activation of the nucleus accumbens by rewarding stimuli (+ events)
How is the presentation of depression often misleading?
- often complain of stomach upset, pain sensitivity, fatigue, fibromyalgia
- anxiety/insomnia often co-exist (req BZDs/Z drugs)
What is the global Pt assessment for depression?
- Medical - low thyroid, anemia, chronic pain, infections, electrolytes, liver, CV, epilepsy, PD’s, AD’s, Malignancy
- Substance-related - EtOH, THC, Nicotine, Opiate, Stimulant
- Drugs/Hormones
- Stresses/Losses
MUST include Thyroid Function!! - hard to get depression to improve if this is low
Use of BZD’s?
may be useful to reduce distress, anxiety, insomnia - esp. early in Tx
do NOT really treat the illness
consider potential for dependence & non-adherence
Antidepressants
What do they target?
Why don’t they work fast?
Why take them when things are going better?
Can you become addicted?
take several weeks to work (3-6 ish)
can get relapse?
cannot get addicted to them
Can you use St. John’s Wort for Depression?
- multiple active components which impact many NT’s/targets
- effective for MILD to MODERATE depression
____ is a key cause of depression
NT dysfunction
- altered communication b/t brain neurons & neuron tracts/systems
What are the 2 key potential sites for drug action?
- REUPTAKE into the nerve ending or UPTAKE into a glial cell
- Degradation
Antidepressants
Immediate effects vs Long-term effects
Immediate effects:
- enhance “impact” or signalling of NT across synapse (esp. 5HT, NE, & DA)
- IMMEDIATE BENEFITS UNLIKELY, SE’s ARE LIKELY
Over 2-4 weeks & beyond:
- sustained enhanced signalling
- DO NOT CAUSE ADDICTION, DEPENDENCY
Long-term admin is NEEDED for FULL & OPTIMAL BENEFITS
Ketamine for Depression?
lower dose of IV may produce Antidepressant effects within 4hrs
how? NO SPECIFIC EFFECTS ON NTs
RAPID effects on G proteins (like a flood of NT)
Try use something that targets more than 1 NT b/c…
if any of these are under-preforming, it can affect there effects
What is consistent with better outcomes?
- access to supports
- adherence to tx
- a history of “more rapid” response
- lower life stressors are consistent with better outcomes
