chapter 7 antidepressants, antipsychotics, antianxiety agents, and alcoholism
TRANSCRIPT
Chapter 7Antidepressants, Antipsychotics,
Antianxiety Agents, and Alcoholism
Chapter 7 Topics
• Antidepressants
• Antipsychotics
• Antianxiety Agents– Panic Disorders– Sleep Disorders
• Alcoholism
Learning Objectives
• Differentiate the antidepressant, antipsychotic, and antianxiety agents.
• Be prepared to discuss the antidepressant classes, their uses, and their side effects.
• Know why and how lithium and other drugs are used in treating bipolar disorders.
Learning Objectives
• Be familiar with antipsychotics and the drugs that prevent their side effects.
• Define anxiety, learn its symptoms, and know the drugs used in its treatment.
• Recognize the course and treatment of panic disorders, insomnia and alcoholism.
Antidepressants
• Used to treat depression• Depression, common feelings
– Pessimism– Worry– Intense sadness– Loss of concentration– Slowing of mental processes – Problems with eating and sleeping
Antidepressants Common Symptoms of Depression
– Loss of interest in usual activities
– Low self-esteem
– Self-pity
– Significant weight loss or gain
– Insomnia or hypersomnia
– Extreme restlessness
– Loss of energy
– Feelings of worthlessness
– Diminished ability to think
– Feelings of guilt
– Recurrent thoughts of death
– Suicide attempts
Antidepressants
Depression
• Women are affected more often than men
• When men are affected, it is usually later in life
• Levels of neurotransmitters in the brain may be a causative factor
Mood Disorders
• Mania
• Bipolar Disorder
• Unipolar Disorder
Mood Disorders
• ManiaMood of extreme excitement, excessive elation, hyperactivity, agitation, and increased psychomotor activity
• Bipolar Disorder
• Unipolar Disorder
Mood Disorders
• Mania
• Bipolar DisorderMood swings alternate between major depression and mania
• Unipolar Disorder
Mood Disorders
• Mania
• Bipolar Disorder
• Unipolar DisorderMajor depression with no previous occurrence of mania
Discussion
Describe the differences that may be seen in patients with unipolar and bipolar disorders.
Discussion
Describe the differences that may be seen in patients with unipolar and bipolar disorders.
Answer
Unipolar – Depression Symptoms Bipolar – Depression and Mania Symptoms
Treatment for Depression
Electroconvulsive Therapy• Introduction of brief, but convulsive
electrical stimulation through the brain
• Can induce seizures
• Effective for major and delusional depression
Antidepressants
• Selective Serotonin Reuptake Inhibitors (SSRIs)
• Cyclic Antidepressants
• Monoamine Oxidase Inhibitors (MAOIs)
Antidepressants
Selective Serotonin Reuptake Inhibitors (SSRIs)
– Block the reuptake of serotonin, with little effect on norepinephrine
– Fewer side effects than older meds
Treatments
Cyclic Antidepressants – Two Types
• Tricyclic antidepressants (TCAs)• Tetracyclic antidepressants
– Prevent reuptake of norepinephrine and/or serotonin
– Agents in this class differ in adverse effects, cost, and response
Treatments
Monoamine Oxidase Inhibitors (MAOIs)Allows for buildup of norepinephrine at the synapse
SSRIs for Depression
• citalopram (Celexa)
• escitalopram (Lexapro)
• fluoxetine (Prozac,)
• paroxetine (Paxil)
• sertraline (Zoloft)
• venlafaxine (Effexor)
Drug List
Dispensing Issues
Look-Alike Drugs
– Prozac and Proscar (urinary drug)
– Zoloft and Zocor (high cholesterol)
– Celexa and Cerebyx (seizures) and Celebrex (arthritis)
Warning!
SSRIDispensing Issues
• Do not discontinue abruptly
• Alcohol consumption should be avoided while taking these medications
Warning!
fluoxetine (Prozac)
• Indicated for major depression and obsessive-compulsive disorder (OCD)
• Anorexia is a possible adverse effect
• Take in the morning to avoid insomnia
paroxetine (Paxil)
• Indicated for depression, obsessive-compulsive disorder, and panic disorder
venlafaxine (Effexor)
• Blocks reuptake of serotonin and norepinephrine
• Indicated for depression
• May cause increase in blood pressure and blurred vision
sertraline (Zoloft)
• Indicated for depression and obsessive-compulsive disorder
• Primary side effect is nausea
• May also cause drowsiness
citalopram (Celexa)
• Indicated for depression and obsessive-compulsive disorder
• Minimal drug interactions
escitalopram (Lexapro)
• Similar to Celexa
• More potent with fewer side effects
Cyclic Antidepressants
Tricyclic• amitriptyline (Elavil)• nortriptyline (Pamelor)
Drug List
Tricyclic Antidepressants Dispensing Issues
• Improvements are usually seen in 10 to 21 days
• Can be cardiotoxic in high doses
• May cause postural hypotension
Warning!
Tricyclic AntidepressantsDispensing Issues
Do not discontinue abruptly.
Warning!
Cyclic Antidepressants Side Effects
• Sedation is common, but tolerance usually occurs
• Have many anticholinergic effects
Discussion
Why would cyclic antidepressants be prescribed for bed wetting in children?
Discussion
Why would TCAs be prescribed for bed wetting in children?
Answer They may be prescribed because of their anticholinergic side effects.
MAOIs
• phenelzine (Nardil)
• selegiline (Eldepryl)
• tranylcypromine (Parnate)
Drug List
MAOI Dispensing Issues
Be cautious of many interactions with foods such as aged cheeses, concentrated yeast extracts, pickled fish, sauerkraut, broad bean pods, chocolate, and alcohol.
Warning!
MAOI Dispensing Issues
If changing to another class of antidepressant, patient must have a two-week “wash out” period before starting the new medication.
Warning!
Other Antidepressants
• bupropion (Wellbutrin, Zyban)
• mirtazapine (Remeron)
• trazodone (Desyrel)
Drug List
trazodone (Desyrel)
• Prevents reuptake of serotonin and norepinephrine
• Has a better side effect profile than TCAs
• Caution: possible interaction with Ginkgo
bupropion (Wellbutrin, Zyban)
• Dopamine-uptake inhibitor
• Does not cause sedation, blood pressure changes, or ECG changes
• Do not discontinue abruptly
• Approved in the aid of smoking cessation
Other Antidepressant Dispensing Issues
• Wellbutrin SR = BID dosing
• Wellbutrin XL = QD dosing
Warning!
Bipolar Disorders
Signs or Symptoms– Decreased need for sleep– Elevated or irritable mood– Excessive involvement in pleasurable activities
with a big potential for painful consequences– Grandiose ideas– Pressure to keep talking– Racing thoughts
Discussion
What is the drug of choice for treating bipolar disorders?
Discussion
What is the drug of choice for treating bipolar disorders?
Answer
Lithium
Discussion
What is the two-fold objective of drug therapy for bipolar disorder?
Discussion
What is the two-fold objective of drug therapy for bipolar disorder?
Answer
Treat acute episodes
Prevent subsequent attacks
Drugs to Treat Bipolar Disorders
• carbamazepine (Tegretol)
• divalproex (Depakote)
• lithium (Lithobid)
• olanzapine-fluoxetine (Symbyax)
• valproic acid (Depakene)
Drug List
Lithium Side Effects
• Gastrointestinal
• Dermatologic
• Hematologic
• Neuromuscular
• Weight
• Renal
• Teratogenic
Lithium Dispensing Issues
Lithobid tablets are only effective for 6 months. Be sure to highlight expiration dates on containers.
Warning!
divalproex (Depakote)
• Beneficial for patients with rapid mood changes
• Take with food or milk, but not carbonated drinks
• Beware of symptoms of thrombocytopenia
Antipsychotics
• Also called neuroleptics• Schizophrenia is the primary indication
– Retreat from reality– Delusions– Hallucinations– Ambivalence– Withdrawal– Bizarre or regressive behavior
Antipsychotics
• Helps with thought disorders, hallucinations, and delusions
• Does not help with emotional and social withdrawal, ambivalence, or poor self-care
Antipsychotics
• aripiprazole (Abilify)
• clozapine (Clozaril)
• fluphenazine (Prolixin)
• haloperidol (Haldol)
• loxapine (Loxitane)
Drug List
Antipsychotics
• molindone (Moban)
• olanzapine (Zyprexa)
• prochlorperazine (Compazine)
• quetiapine (Seroquel)
Drug List
Antipsychotics
• risperidone (Risperdal)
• thioridazine
Drug List
Antipsychotic Side Effects
• Anticholinergic
• Cardiovascular
• Dermatologic
• Endocrine
• Hematologic
• Ophthalmologic
Antipsychotic Side Effects
• Withdrawal
• Neurologic– Dystonia– Akathisia– Pseudoparkinsonism
• Tardive dyskinesia
Atypical Antipsychotics
• Have improved efficacy and reduced side effects
• Better tolerated, but associated with metabolic side effects
risperidone (Risperdal)
• Indicated for management of psychotic disorders and dementia in the elderly
• It is a serotonin-dopamine antagonist
Dispensing Issues
Clozaril (antipsychotic) and Clinoril (antibiotic) are look-alike/sound-alike drugs.
Warning!
olanzapine (Zyprexa)
• Used for schizophrenia
• Blocks dopamine and serotonin receptors
• Causes fewer movement disorders and is more effective
• Alcohol must be avoided
Dispensing Issues
Zyprexa (antipsychotic) and Zyrtec (antihistamine) are look-alike/sound-alike drugs.
Warning!
quetiapine (Seroquel)
• Related to Clozaril
• Lower incidence of hematologic toxicities
Minimizes Side Effects of Antipsychotics
• benztropine (Cogentin)
• diphenhydramine (Benadryl)
• meclizine (Antivert)
Drug List
Antianxiety Agents
Anxiety
State of uneasiness characterized by apprehension and worry about possible events
Antianxiety Agents
Two Types of Anxiety
• ExogenousResponse to external stresses
• EndogenousNot related to external stresses, result of abnormality in cellular function in the CNS
Discussion
What is the most common self-prescribed treatment for anxiety?
Discussion
What is the most commonly self-prescribed treatment for anxiety?
Answer
Alcohol
Antianxiety Agents
• Benzodiazepines
• Other Controlled Medications
• Some Non-Controlled Medications
Antianxiety Agents
• amoxapine
• buspirone (BuSpar)
• hydroxyzine (Vistaril), antihistamine
• paroxetine (Paxil), SSRI
Drug List
Antianxiety Agents
• propranolol (Inderal), beta blocker
• venlafaxine (Effexor)
Drug List
Antianxiety Agents
Benzodiazepines, C-IV• alprazolam (Xanax)• chlordiazepoxide (Librium) • clorazepate (Tranxene)• diazepam (Valium)• lorazepam (Ativan)• oxazepam (Serax)
Drug List
Antianxiety Agnets
Benzodiazpines
• May cause physical dependence, C-IV
• Should not be stopped abruptly
• Side Effects– Muscle relaxation– Paradoxical excitement– Sedation
Dispensing Issues
Xanax (antianxiety) and Zantac (H2 Antagonist for the stomach) are look-alike/sound-alike drugs.
Warning!
propranolol (Inderal)
• Beta blocker used to treat physical symptoms of anxiety
• Not officially indicated for this use
• Lowers heart rate which decreases nervousness due to stage fright or test anxiety
buspirone (Buspar)
• Selectively antagonizes serotonin receptors
• Take with food
• Report changes in the senses
Dispensing Issues
Buspirone (antidepressant/antianxiety) and bupropion (antidepressant) are look-alike/sound-alike drugs.
Warning!
Panic Disorders
Panic• Intense, overwhelming, and uncontrollable
anxiety
• Neither a controllable voluntary emotion nor a condition that can be avoided by ignoring it or wishing it away
Panic Disorders
• Can occur anywhere at anytime
• Criteria for Diagnosis– Three attacks in a three-week period– At least four qualifying symptoms
Panic Disorders
Pathophysiology
• Result from a neurochemical defect
• The brain stem is a pathway for sensory information
• If there is a defect in the brain stem, stimuli can be excessively amplified and cause an overreaction
Panic Disorders
Treatment• Combination of antipanic medication and
behavioral therapy• Psychotherapy is preferred treatment when
symptoms cause significant discomfort or impairment
• Antianxiety medications are indicated for short-term treatment
Discussion
What fraction of Americans 18 and older have a sleep disorder?
Discussion
What fraction of Americans 18 and older have a sleep disorder?
Answer
1/3
Sleep Disorders
Insomnia
• Difficulty falling or staying asleep or not feeling refreshed on awakening
• Treated with hypnotics (to induce sleep)
Sleep Disorders
Causes– Situational
Sleep Disorders
Causes– Situational– Medical
Sleep Disorders
Causes– Situational– Medical– Psychiatric
Sleep Disorders
Causes– Situational– Medical– Psychiatric– Drug induced
Sleep Disorders
Stages of Sleep
Stage 1 Somewhat aware of surroundings, but relaxed
Sleep Disorders
Stages of Sleep
Stage 1 Somewhat aware of surroundings, but relaxed
Stage 2Unaware of surroundings, but can easily be awakened
Sleep Disorders
Stages of SleepStage 1
Somewhat aware of surroundings, but relaxed
Stage 2Unaware of surroundings, but can easily be awakened
Stage 3Deep sleep (REM sleep); dreams occur
Sleep Disorders
Narcolepsy
• Involves recurring, inappropriate episodes of sleep during the daytime hours
• No known cause
• Occurs four times more in men than women
Sleep Disorders
Characteristic Symptoms
1. Patient feels sleepy during the daytime and then enters into REM sleep
Sleep Disorders
Characteristic Symptoms
1. Patient feels sleepy during the daytime and then enters into REM sleep
2. Patient experiences cataplexy with sudden emotions
Sleep Disorders
Characteristic Symptoms
1. Patient feels sleepy during the daytime and then enters into REM sleep
2. Patient experiences cataplexy with sudden emotions
3. Sleep paralysis
Sleep Disorders
Characteristic Symptoms1. Patient feels sleepy during the daytime
and then enters into REM sleep2. Patient experiences cataplexy with sudden
emotions3. Sleep paralysis4. Very vivid hallucinations at the onset of
sleep
Sleep Disorders
Treatment of Narcolepsy
• Nondrug TherapyLifestyle changes
• Drug Therapy– Stimulants – Tricyclic antidepressants– SSRIs
Sleep Disorders
• Pharmacological TreatmentHypnotics
• Nonpharmacological Treatment– Normalizing sleep schedule– Increases physical exercise– Discontinuing alcohol use as a sedative– Sleep only 7-8 hours/24 hr– Reducing caffeine and nicotine intake
Sleep Disorders
Treatment
• Hypnotics should be used in conjunction with other medical therapeutics
• Benzodiazepines are the preferred agents
• Hypnotics should not be taken every night, only as needed
Dispensing Issues
Diazepam, lorazepam, and alprazolam can be misread and misheard.
Warning!
Sleep Agents
Benzodiazepines, C-IV• alprazolam (Xanax)• chlordiazepoxide (Librium)• clorazepate (Tranxene)• diazepam (Valium)• estazolam (ProSom)• flurazepam (Dalmane)
Drug List
Sleep Agents
Benzodiazepines, C-IV
• lorazepam (Ativan)
• oxazepam (Serax)
• temazepam (Restoril)
• triazolam (Halcion)
Drug List
Sleep Agents
Barbiturates• amobarbital (Amytal), C-II• butabarbital (Butisol), C-III• secobarbital (Seconal), C-II
Antihistamines• diphenhydramine (Benadryl)• hydroxyzine (Vistaril)
Drug List
Sleep Agents
Hypnotic
• chloral hydrate
Others
• zaleplon (Sonata)
• zolpidem (Ambien)
Drug List
zolpidem (Ambien)
• Targets benzodiazepine receptors with less effects on skeletal muscles and seizure threshold
• Short-term treatment only– Should not be used for more than 10 days – Alert the pharmacist, but realize there are
exceptions
Alcoholism
• Denial is one of the major roadblocks for a patient to overcome before getting help
• Linked to genetics
• No cure, but can be arrested
Alcoholism
Effects on Metabolism and Excretion
• Alcohol is an anesthetic and can cause loss of consciousness
• Emetic action prevents death by preventing absorption of lethal concentrations
• Habitual drinkers metabolize ETOH quicker, which increases tolerance
Alcoholism Side Effects
• Vitamin deficiency
• Gastritis
• Organic brain damage
• Alcoholic psychosis and dementia
• Cirrhosis of the liver (irreversible damage)
Alcoholism
Symptoms of Dependence on Alcohol• Blackouts or lapses of memory• Concerns of family, friends, and employers
about the substance use• Doing things that cause regret afterwards• Financial or legal problems from substance
use• Loss of pleasure with the substance
Alcoholism
Symptoms of Dependence on Alcohol• Neglecting responsibilities• Trying to cut down or quit using a
substance, but failing• Using alone; hiding evidence• Using to forget about problems• Willingness to do almost anything to get the
substance
Alcoholism
Steps Towards Recovery
1. Acknowledge the problem
2. Limit the time spent with substance abusers
3. Seek professional help
4. Seek support from recovering alcoholics
Alcoholism
Withdrawal Symptoms• Agitation• Circulatory disturbances• Convulsions• Delirium treatments• Digestive disorders• Disorientation• Extreme fear
Alcoholism
Withdrawal Symptoms• Hallucinations• Mental disturbances• Nausea and vomiting• Restlessness• Sweating• Temporary suppression of REM sleep• Tremor and weakness
Alcohol Antagonists
• disulfiram (Antabuse)
• naltrexone (Revia)
• topiramate (Topamax) – not approved yet
Drug List
disulfiram (Antabuse)
• Stops the metabolism of alcohol• Upon consumption of alcohol, side effects
are immediate:– Blurred vision – Confusion– Difficulty breathing – Chest
pain– Severe headache – Nausea– Severe vomiting – Uneasiness– Face becomes hot & scarlet – Thirst
disulfiram (Antabuse)
• Patients must read labels to avoid ETOH:– Cough medicines– Mouthwashes– Flavorings– Salad dressings
topiramate (Topamax)
• Anticonvulsant that can reduce cravings for alcohol
• Takes six weeks to be effective
• Topamax mixed with behavioral therapy looks promising in the treatment of alcoholism