Test 1 - Medications for Mental Health Flashcards
What are the nurse’s role in medication administration for mental health?
- Informed consent must be on file for EACH medication
- Assess for changes in behavior
- assess if causes side effects
- awareness of interactions with other medications
- Pt/Fam education re: meds, compliance, labs
NOT A CURE!!!
WHat is steady state?
an even level of the medication in the blood. A balance between metabolism/elimination and distribution of the medication.
What is half life?
time it takes for blood plasma concentration in blood to be reduced to 50%
Who might need a smaller dose?
elderly pt with decreased kidney and liver function and children.
drugs must be ____ soluble to pass through the blood brain barrier
lipid
Catecholimines are derived from _____
tyrosine
What are some examples of catecholamines?
epinephrine
norepinephrine
dopamine
(all end in ine)
What are the three ways that medication can acts on the body?
block (block receptors…ex decrease dopamine by blocking receptors)
inhibit reuptake (allowing more to pass through synapse)
metabolism (liver, first pass effect, etc)
An agonist ______ activity of neurotransmitter
An antagonist ______ activity of neurotransmitter
Ag - increases
Antag - decreases
P450 System - easy to read nurse’s overview
http://www.drugguide.com/ddo/view/Davis-Drug-Guide/109519/all/The_Cytochrome_P450_System:What_Is_It_and_Why_Should_I_Care
An inducing agent can ______ the rate of another drug’s metabolism by as much as two- to threefold.
increase. increase metabolism = decreased effects of the medication.
Need to increase med that is being metabolized quickly to ensure therapeutic effect.
When an inducing agent is prescribed with another medication, the dosage of the other medication may need to be adjusted since the rate of metabolism is increased and the effect of the medication reduced. This can lead to a therapeutic failure of the medication.
If a medication is taken with an agent that inhibits its metabolism, then the drug level can _____ and possibly result in a harmful or adverse effect.
rise
no metabolism means it is building up in the body
Some substances can increase the production of isoenzymes that metabolize several antipsychotics and antidepressants. This INCREASES the metabolism, thereby decreasing their plasma level. What is a common example?
smoking cigarettes
When grapefruit is consumed with antidepressants or anti-anxiety medication, what happens to the level of medication plasma level?
The plasma level increases. Grapefruit juice inhibits the enzyme that metabolizes the drug. If not metabolized, more drug remains in the plasma.
Neurotransmitters are _____ messengers released from the axons into the synaptic cleft
chemical
Antipsychotic meds work by blocking/partially blocking _______ receptors. This reduces agression, decreases psychotic symptoms.
dopamine
If 80% block of dopamine occurs, what might it cause?
EPS - extrapyramidal symptoms
What are eps symptoms?
- Dystonia
- Drug induced parkinsonism
- Akathisia
- Tardive Dyskinesis
What is dystonia? examples?
Dystonia is an uncontrolled contraction of the muscles. Examples are:
- Torticollis - neck twisting
- Opisthonos - neck bending backward (causing upward facing position)
- oculogyric crisis - eyes are stuck looking back into head. Can only see whites. (SEEN WITH 1st GEN)
What happens in drug induced parkinsonism?
Looks like parkinsons:
- shuffling gate
- cogwheeling.
- pinrolling
- tremors
- mask like face
What is akathisia mistaken for?
anxiety
restless, not able to sit, need to keep moving
Is Tardive Dyskinesis reversible?
What does it look like?
No
lip smacking licking lips grimacing foot tapping rocking
caused by over-abundance of acetylcholine.
What medications can be taken to control EPS (given with the med that can cause EPS)?
Medications with anticholinergic properties (anti cholinergic = against rest and digest…puts you in fight or flight…increases fight or flight properties)
Examples:
TrihexyPHENidyl (Artane)
^DiPHENhydramine (Benedryl)
^BENZTROPINE/Benxtropine Mesylate (Cogentin)
memory trick: TriDiBenzphenhydraminpine
PHEN-PHEN-BENZ
What is NMS?
Neuroleptic Syndrome - severe and life threatening (movie we watched)
What are the signs of NMS?
- rigid muscles
- altered LOC
- fever
- sweating (diaphoresis)
- increased CPK (can lead to kidney failure)
*Sometimes there is no change in vitals or sweating
T or F: Tagamet and St. John’s word can interact with drugs.
True
Tagamet reduces effectiveness of antipsychotics.
Serotonin syndrome can occur with st. John’s wort
Antipsychotic meds are used to treat psychois/schizophrenia and bipolar disorder/manic phase. How does it do this?
decreases agitation, confusion, belligerence, uncooperativeness.
What type of effect do Antipsychotics have at first? After 2-8 weeks?
at first sedative
after 2-8 weeks, works on hallucinations/delusions
What is a route to administer medication to avoid the first pass effect?
IM, IV
Do older 1st generation antipsychotics treat negative symptoms, positive symptoms or both?
1ST GEN WORKS ON DOPAMINE ONLY!
positive symptoms which include: Hallucinations, delusions, agitation.
Also includes:
- disordered thoughts, perceptions and behavior (the visible signs)
- abnormal/bizarre behavior
- de-personalization
- Feelings or behaviors that are usually not present, such as: Believing that what other people are saying is not true (delusions) - Hearing, seeing, tasting, feeling, or smelling things that others do not experience (hallucinations)
- Disorganized speech and behavior
“I am positive that you have schizophrenia by what I see”
To remember: 1st we get rid of what we see you going through. (1st gen)
What is the risk with older antipsychotics?
1ST GEN WORKS ON DOPAMINE ONLY!
- more potential to cause EPS
- Thorazine should not be given to elderly due to orthostatic hypotension
Why should a patient taking phenothiazines (1st gen antipsychotics) avoid the sun?
1ST GEN WORKS ON DOPAMINE ONLY!
it can cause a skin rash (A PURPLE BLUE RASH).
What are examples of phenothiazines (1st gen antipsychotics)?
1ST GEN WORKS ON DOPAMINE ONLY!
^ CHLORPROMAZINE, HALOPERIDOL (
Trifluoperazine, Thiothixene, fluphenazine, chlorpromazine, loxapine, perphenazine, prochlorperazine, haloperidol (haldol), and molindone (NOT LEGAL IN US).
Notice most end in the sound ZEEN
Remember: First (first generation), people used to read papers and magaZINES. Now (2nd generation), we carry tablets or nooks.
T or F: deconate/depot is long acting
true.
Prolixin, haldol, risperdal, zyprexa.
Given IM - lasts 2-4 weeks
Best IM, oral is hard to get patient to comply with ABC’s and end up with EPS
Do newer 2nd generation antipsychotics work on negative symptoms, positive symptoms or both for schizophrenia?
both.
You know positive symptoms.
What are negative symptoms?
the opposite of positive/manic - who are agitated/”wound up” seeing thing, over the top…negative is flat, blunted, no energy, no speech/alogia, low interest, autism, withdrawn, avolition aka low motivation, pacing/rocking, posturing, deteriorated.
How do 2nd generation antipsychotics work?
They have an affinity for dopamine (D2) and serotonin (5HT) receptors.
They decrease dopamine - slowing the manic/positive. In some instances the dopamine in the mesocortical system is increased by antagonizing serotonin.
They increase serotonin - the mood balancer/ brings up the negative. DECREASES SUICIDE RISK.
If 2nd gen antipsychotic is taken with ETOH (alcohol) it becomes?
toxic
ETOH = contraindicated
T or F: 2nd generation is also called atypical
true
__ ___ __ is reduced with atypicals
EPS
A common contraindication for ANY med is?
liver insufficiency
typically renal insufficiency
2nd gen antipsychotic meds are contraindicated with what two meds? why?
SSRIs - increases risk of EPS
Beta Blockers - hypotension
2nd generation antipsychotics have names ending in APINE and IDONE
^CLOZAPINE ^OLANZAPINE Quetiapine Asenapine (Loxapine is 1st gen- only one that doesn't fit in).
^RISPERIDONE zipraidone lursidone iloperidone paliperidone
What is the most serious side effect of clozapine (clozaril)?
agranulocytosis (decreases WBCs) - deadly
Must do CBC/wbc/neutrophil count weekly.
RESERVED FOR PT WHO DOES NOT RESPOND TO OTHER ANTIPSYCHOTICS
Olanazapine and Quetiapine cause weight gain
Memory: Olana and Quetia are big girls.
olana - used for mania
Risperidone, quetiapine, and iloperidone have a risk for what?
hypotension
RisQUe-i-Lo
RIsk of low BP
remember where there is hypotension there is a likelihood of dizziness