Anti-Psychotic Flashcards
Anti-Psychotic medications
Should be handled by a Psychiatrist. However we will see them in primary care
Conventional
First developed to treat schizophrenia by clocking dopamine-2 (D2) receptors It reduced hyperactivity in the mesolimbic dopamine pathway
Caused extrapyramidal side effects
Tardive dyskinesia which can be irreversible
Prolactin levels also increase.
Atypical antipsychotics
work on D2 antagonism with serotonic-2A antagonism. Fewer negative side effects. Weight gain, obesity, dyslipidemia, diabeters and CVD. Clozapine and olanzapine have the highest risk while ziprasidone and aripiprazole have the lowest risk.
Seizure medicatoins
These clients need to be followed by a neurologist
Partial seizures and tonic-clonic seizures
Carbamazapine (Tegretol)
Can cause bone marrow suppresion, has many drug interactions, particularly oral contraceptives and folic acid. High incidence of Stevens-Johson syndrome in Asians patients. Must screen for the variant HLA-B1502 allele prior to initiating
Grand mal seizures - tonic/clonic
Phenytoin (Dilantin)
Used to prevent seizures after head injuries, etc. Lots of drug-drug interactions
Petit mal seizures
Valproic acid and lamotrigine have fewer side effects and are preferred. Can use Zarontin, Depakote or Lamictal. Do platelet counts. Watch for bruises and bleeding.
These lead to oral contraceptives not working because of the CYP450 enzymes.
Better to use progestin only pills or depo shot
Seizures and pregnancy
Due to many quit taking their medications. Need to take meds. Slight risk of teratogenicity. It is complex.
Most antiepileptic drugs will pass to breastmilk
THE AAP says to use Zarontin, Tegretol, Dilantin, and Depakene. Don’t use Lamictal. Monitor infant for jaundice, drowsiness, etc.
During menopause
Women need to take high calcium 1200 mg and vitamin D 600 IU’s per day.
Parkinsons
Imbalance between Dopamine and acetylcholine (Ach)
Parkinsons
Tremor at rest rigidity postural instability breadykinesia can cause depression, psychosis, etc.
Goal of treating parkinsons
reduce symptoms
Levodopa combined with carbidopa is the most effective
Adverse effects of Levodopa
nausea, dyskineisas, hypotension and psychosis
First generation antipsychotic drugs block dopamine receptors
Amino acids compete with levodopa for absorption from the intestine and across the blood brain barrier.. High protein diet can reduce therapeutic effects
Drugs for PD
Dopamine agonists-Pramipexole an oral nonergot dopamine agonist first line for motor symptoms
It can be used alone early or added to Levodopa later
Adverse effects: nausea, dyskinasia, hallucinations, TAKE WITH FOOD
Anticholinergic drugs for PD
relieve symptoms by blocking cholinergic receptors. Amantadine is commonly used.
Causes dry mouth, constipation, etc.
Alzheimers
Cannot be cured. just help with symptoms
None of them work great
NMDA- Mamenda
or Cholinesterase inhibitors-Aricept (mild), Exelone (moderate) Cognex (May elevate LFTs and cause liver toxicity. many drug interactions.