Pharmacology - Pemberton Counseling

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Pharmacology

Overview

Major Types

Antidepressants

Mood Stabilizers

Anti Anxiety

ADHD

Anti psychotics

Antidepressants

 Major Groups

Atypicals – unique properties

SSRI – most popular

SNRI – more effective/side effects

NRI - new

Cyclic – react with multiple sites

MAOI – high risk of hypertensive reaction

Antidepressants cont’

Page 176 – Choice of antidepressant

Special Considerations - 177

Side effects

Start low

Nausea – take with meal

Insomnia – take in morning

Anxiety – reduce caffeine

Sedation – take at night

Sexual – other medication

Dry mouth – gum, water

Am Psych Assoc

Mood Stabilizers

the initiation of either lithium plus an antipsychotic or valproate plus an antipsychotic

[I]. For less ill patients, monotherapy with lithium, valproate , or an antipsychotic such as olanzapine may be sufficient [I]. Short-term adjunctive treatment with a benzodiazepine may also be helpful [II]. For mixed episodes, valproate may be preferred over lithium [II]. Atypical antipsychotics are preferred over typical antipsychotics because of their more benign side effect profile [I], with most of the evidence supporting the use of olanzapine or risperidone [II]. Alternatives include carbamazepine or oxcarbazepine in lieu of lithium or valproate [II]. Antidepressants should be tapered and discontinued if possible [I]. If psychosocial therapy approaches are used, they should be combined with pharmacotherapy [I].

For patients who, despite receiving maintenance medication treatment, experience a manic or mixed episode (i.e., a “breakthrough” episode), the first-line intervention should be to optimize the medication dose [I]. Introduction or resumption of an antipsychotic is sometimes necessary [II]. Severely ill or agitated patients may also require short-term adjunctive treatment with a benzodiazepine [I].

When first-line medication treatment at optimal doses fails to control symptoms, recommended treatment options include addition of another first-line medication

[I]. Alternative treatment options include adding carbamazepine or oxcarbazepine in lieu of an additional first- line medication [II], adding an antipsychotic if not already prescribed [I], or changing from one antipsychotic to another [III]. Clozapine may be particularly effective in the treatment of refractory illness [II]. ECT may also be considered for patients with severe or treatment-resistant mania or if preferred by the patient in consultation with the psychiatrist [I]. In addition, ECT is a potential treatment for patients experiencing mixed episodes or for patients experiencing severe mania during pregnancy [II].

Manic or mixed episodes with psychotic features usually require treatment with an antipsychotic medication [II].

Mood Stabilizers cont’

 Choices

Lithium

 Monitor

 Side effects

Anticonvulsants – Tegretol/Depakote

Different side effects for each

New – Lamictal/Topamax – more research

Atypical Antipsychotics

 Frequently used, more research needed

Antianxiety Medications

Barbiturates

Benzodiazepines

 Differences in pharmacodynamics

 Half-lives

 Where metabolized

Atypical Benzo’s

 Ambien vs Sonata – sleep aids

Buspirone

 Not shown to be addictive

Antianxiety Medications cont’

Antihistamines

 Not addictive – can build tolerance

Beta blockers

Used as hypertensives

Interact with many other drugs

Assist in peripheral symptoms of anxiety

Antianxiety Medications cont’

 Other notes

 Withdrawal

 Worse with short half lives

Anxiety can return

Difficult to end treatment

Dependence

Types according to Dr. Amen

Type 1: Classic ADD

Restlessness, hyperactivity, constant motion, troubles sitting still, talkative,

.

impulsive behavior, lack of thinking ahead

Type 2: Inattentive ADD

Short attention span (especially about routine matters), distractibility, disorganization, procrastination, poor follow-through/task completion.

Types con’t

Type 3: Overfocused ADD

Worrying, holds grudges, stuck on thoughts, stuck on behaviors, addictive behaviors, oppositional/argumentative.

Type 4: Limbic ADD

Sad, moody, irritable, negative thoughts, low motivation, sleep/appetite problems, social isolation, finds little pleasure.

Types con’t

Type 5: Temporal Lobe ADD

Inattentive/spacey/confused, emotional instability, memory problems, periodic intense anxiety, periodic outbursts of aggressive behavior seemingly triggered by small events or intense angry criticisms directed at himself for failures and frustrations, overly sensitive to criticism and slights by others, frequent headaches and/or stomachaches, learning difficulties, and serious misperceptions/distortions of people and situations.

Types con’t

Type 6: Ring of Fire ADD

A ring of overactivity in the brain scan image which surrounds most of the brain is the source of the name for this type of

ADD. too many thoughts, very hyper behavior, very hyper verbal expressiveness, a hypersensitivity to light, sound, taste, or touch.

Amen’s interventions

Type 1: Classic ADD

Stimulant medication (Ritalin, Adderall, etc.), a diet with more protein and less carbohydrates, intense aerobic exercise.

Type 2: Inattentive ADD

Stimulant medication, perhaps stimulating antidepressants (Welbutrin, for example), a diet with more protein and less carbohydrates, intense

Amen’s interventions

Type 3: Overfocused ADD

An antidepressant that has a dual focus on two brain transmitters (seratonin and dopamine) (Effexor, for example), and/or an antidepressant that enhances seratonin

(Prozac, Zoloft, Paxil, or others, for example). A stimulant medication may need to be added. A diet with less protein and increased complex carbohydrates will help, along with intense aerobic exercise.

Amen’s interventions

Type 4: Limbic ADD

An antidepressant that is also stimulating (Effexor or Welbutrin, for example), with a stimulant medication could be added; a balanced diet, and intense exercise.

Amen’s interventions

Type 5: Temporal Lobe ADD

Anticonvulsant medication (Neurontin,

Depakote for example), a stimulant could be added; a diet with more protein and less simple carbohydrates.

Type 6: Ring of Fire ADD

Anticonvulsant medication (Neurontin,

Depakote for example, a stimulant medication could be added; sometimes some of the newer, different anti-psychotic medications may help (Risperdal, or

Zyprexa); a diet with more protein and less simple carbohydrates.

Types of Medications

Methylphenidate

Dextroamphetamine

Atomoxetene

Dexmethylphenidate

Antidepressants

SSRI’s

 Tricyclics

Basic Elements of

Methylphenidate

Known as: Ritalin, Ritalin SR, Ritalin LA,

Concerta, Metadate ER, Metadate CD,

Focalin

Pharmacology: It is a CNS stimulant, which is chemically related to amphetamine

Preparations – 5, 10, 20 mg tabs; sustained release 20 mg tabs; LA 20, 30, and 40 mg capsules. The SR tablet should be swallowed and not crushed or chewed.

Concerta comes in 18 and 36 mg extended release tablets. Metadate CD 20 mg capsules; Metadate ER 10 – and 20 – mg tabs. Focalin 2.5, - 5-, 10 - mg tabs.

Methylphenidate, cont’d

Half-Life – 3-4 hours; 6-8 hours for sustained release

It’s a schedule II controlled substance, requiring a triplicate prescription

Pre-Drug Work-Up

Blood pressure and general cardiac status baseline and periodic blood counts and liver function tests

Weight and growth should be monitored in children

Methylphenidate, cont’d

 Adverse Drug Reactions

Nervousness and insomnia; can be reduced by decreasing dose.

Cardiovascular – Hypertension, tachycardia, and arrhythmias.

CNS – Dizziness, euphoria, tremor, headache, precipitation of tics and Tourette’s syndrome, and rarely psychosis.

GI – Decreased appetite, weight loss.

Case reports of elevated liver enzymes and liver failure.

Hematological –Leukopenia and anemia have been reported

Growth Inhibition

Basic Elements of

Dextroamphetamine

Known as: Adderall, Adderall XR

Pharmacology:causes the release of norepinepherine from neurons. At higher doses, it will also cause dopamine and serotonin release

Preparations – Adderall 5-, 7.5-, 10-,

12.5-, 15-, 20-, 30-mg tablets; Adderall

XR 5-, 10-, 15-, 20-, 25-, 30-mg capsules.

Dextroamphetamine, cont’d

Half-Life – 10-25 hours

It’s a schedule II controlled substance, requiring a triplicate prescription

Pre-Drug Work-Up

Blood pressure and general cardiac status should be evaluated prior to initiating dextroamphetamine.

Can precipitate tics

Contraindicated in in patients with hypertension, hyperthyroidism, cardiac disease or glaucoma. It is not recommended for psychotic patients ot patients with a history of substance abuse.

Weight and growth should be monitored in all

Dextroamphetamine, cont’d

 Adverse Drug Reactions

Side effects – most common side effects are psychomotor agitation, insomnia, loss of appetite, and dry mouth. Tolerance to loss of appetite tends to develop. Effect on sleep can be reduced by making sure no drug is given after

12 pm.

Cardiovascular – Palpitations, tachycardia, increased blood pressure.

CNS – Dizziness, euphoria, tremor, precipitation of tics, Tourette’s syndrome, and rarely, psychosis.

GI – Anorexia and weight loss, diarrhea,

Basic Elements of

Atomoxetene

Known as: Strattera

Pharmacology:works via presynaptic norepinepherine transporter inhibition

Preparations – 10, 18, 25, 40, and 60 mg capsules .

Atomoxetene, cont’d

Half-Life – approximately 4 hours

Not a schedule II controlled substance

Clinical Guidelines –

Dividing the dose may reduce some side effects

Dose reductions are necessary in presence of moderate hepatic insufficiency

Atomoxetine should not be used within 2 weeks of discontinuation of a MAO inhibitor.

Atomoxetine should be avoided inpatients with narrow angle glaucoma and, it should be used with caution in patients with tachycardia, hypertension, or cardiovascular disease.

It can be discontinued without taper.

Pregnancy C category.

Atomoxetene, cont’d

 Adverse Drug Reactions

Cardiovascular – increased blood pressure and heart rate (similar to those seen with conventional psychostimulant).

BI – Anorexia, weight loss, nausea, abdominal pain.

Miscellaneous – Fatigue, dry mouth, constipation, urinary hesitancy and erectile dysfunction.

Basic Elements of

Dexmethylphenidate

Known as: Focalin, Focalin XR

Pharmacology:causes the release of dopamine from neurons. Is an isomer of Ritalin.

Preparations – Focalin 2.5, 5 ,10-mg tablets; Focalin XR 5-, 10-, 20-mg capsules.

Dexmethylphenidate, cont’d

Half-Life – 2.2 hours

It’s a schedule II controlled substance, requiring a triplicate prescription

Pre-Drug Work-Up

Blood pressure and general cardiac status should be evaluated prior to initiating

Dexmethylphenidate.

Can precipitate tics

Contraindicated in in patients with hypertension, hyperthyroidism, cardiac disease or glaucoma. It is not recommended for psychotic patients or patients with a history of substance abuse.

Weight and growth should be monitored in all

Dexmethylphenidate, cont’d

 Adverse Drug Reactions

Side effects – most common side effects are psychomotor agitation, insomnia, loss of appetite, and dry mouth. Tolerance to loss of appetite tends to develop. Effect on sleep can be reduced by making sure no drug is given after

12 pm.

Cardiovascular – Palpitations, tachycardia, increased blood pressure.

CNS – Dizziness, euphoria, tremor, precipitation of tics, Tourette’s syndrome, and rarely, psychosis.

GI – Anorexia and weight loss, diarrhea,

Release Characteristics

Concerta Metadate

CD

Ritalin LA

30% 50% Immediate

Release

22%

Delayed

Release

78% 70% 50%

Technolog y

Oros Eurand SODAS

Other Medications

Dexadrine

Cylert

 Since marketing in 1975, 13 cases of acute hepatic failure have been reported to the FDA.

11 resulted in death or transplant.

Attenade

Paxil

Wellbutrin

Zoloft

Trileptal

Celexa/Lexapro

Effexor

When to use, when to change

Side effects

Past history

Substance abuse

Efficacy

Onset time

Stimulant first line, Strattera second

Follow MD

Closing Thoughts

Stimulants still first line defense

Look at choice of drug based upon time of release

Be aware of study sponsor

Addictive nature

Subscribe to Medscape

Tools/Resources

ADD/ADHD Behavior-Change

Resource Kit

Teenagers with ADD: A Parents’ Guide www.myadhd.com

www.adhdhelp.com

www.amenclinic.com

ADDitude Magazine

References

American Academy of Pediatrics. Diagnosis and evaluation of the child with attentiondeficit/hyperactivity disorder. Pediatrics.

2000;105:1158-1170.

American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. DSM-IV-TR.

In: Disorders Usually First Diagnosed in Infancy, Childhood, or Adolescence: Diagnostic Criteria for

Attention-Deficit/Hyperactivity Disorder.

Washington, DC: American Psychiatric Association; 1994:92-

93.

National Institute of Mental Health. National Institutes of Health. Attention deficit hyperactivity disorder.

Available at: http://www.nimh.nih.gov/publicat/helpchild.cfm. Accessed April 19, 2002.

U.S. Department of Health and Human Services. Mental Health: A Report of the Surgeon General.

Available at: http://www.surgeongeneral.gov/library/mentalhealth/chapter3/sec4.html. Accessed April

19, 2002.

Dulcan M. Practice parameters for the assessment and treatment of children, adolescents, and adults with attention-deficit/hyperactivity disorder. J Am Acad Child Adolesc Psychiatry.

1997;369(suppl):855-

1215.

American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. DSM-IV-TR.

In: Disorders Usually First Diagnosed in Infancy, Childhood, or Adolescence: Diagnostic Criteria for

Attention-Deficit/Hyperactivity Disorder.

Washington, DC: American Psychiatric Association; 1994:92-

93.

American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. DSM-IV-TR.

In: Disorders Usually First Diagnosed in Infancy, Childhood, or Adolescence: Diagnostic Criteria for

Attention-Deficit/Hyperactivity Disorder.

Washington, DC: American Psychiatric Association; 1994:92-

93.

National Institute of Mental Health. National Institutes of Health. Attention deficit hyperactivity disorder —questions and answers. Available at: http://www.nimh.nih.gov/publicat/adhdqa.cfm.

Accessed April 19, 2002.

National Institute of Mental Health. National Institutes of Health. Attention deficit hyperactivity disorder

—questions and answers. Available at: http://www.nimh.nih.gov/publicat/adhdqa.cfm.

Accessed April 19, 2002.

American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders, Fourth

Edition, Text Revision. Washington, DC, American Psychiatric Association, 2000.

Fauman, M. A. (2002). Study Guide to DSM-IV-TR. Washington, DC: American Psychiatric

Publishing, Inc.

 www.pembertoncounseling.com

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