Psychiatric-Mental Health Nurse Practitioner Clinical Review

Exam Tip: The Clock Drawing Test (CDT) An abnormal clock drawing—such as crowded numbers or misplaced hands—suggests dysfunction in the parietal lobe or executive functions.

Pharmacology and Medication Management

Effective medication management requires an understanding of metabolism, drug-drug interactions, and side-effect profiles.

Stimulants and ADHD

In patients with ADHD, if symptoms return in the afternoon, the medication has likely worn off. Clinical strategies include prescribing an afternoon immediate-release booster or switching to a long-acting formulation. Note that ADHD is a neurodevelopmental disorder; if a patient presents with new inattentiveness in adulthood without a childhood history, you must evaluate for alternative diagnoses like mood disorders or substance use.

Managing Adverse Effects and Interactions

• Trazodone: Be vigilant for priapism (an emergency), sedation, and QT-interval prolongation.
• Dopamine Blockade: Combining Risperdal and Reglan (metoclopramide) significantly increases the risk of tardive dyskinesia (TD) and extrapyramidal symptoms (EPS) due to combined dopamine blockade. Acute dystonia (painful contractions like torticollis) can be treated with benztropine or diphenhydramine.
• Absorption Issues: Antacids and proton-pump inhibitors can decrease antipsychotic absorption by altering gastric pH; medications should be spaced at least 2 hours apart.
• CYP450 Interactions:
  • Inhibitors (↑ Drug Levels): Macrolide antibiotics (e.g., Erythromycin), Fluoxetine, and Valproic Acid can increase levels of other drugs, raising toxicity risks.
  • Inducers (↓ Drug Levels): Carbamazepine, Phenytoin, and Smoking (which induces CYP1A2) can decrease levels of drugs like clozapine, olanzapine, and duloxetine.

Metabolism and Alcohol

Women typically have lower levels of alcohol dehydrogenase, leading to slower metabolism and higher blood alcohol levels compared to men. When managing Alcohol Use Disorder, Acamprosate (Campral) is preferred for patients with liver disease because it is primarily renally excreted.

Therapeutic and Professional Standards

Therapeutic Modalities and Theory

• Brief Supportive Therapy: Indicated for patients experiencing acute stress or grief.
• Couples Therapy: To maintain therapeutic neutrality, an NP must refuse to conduct individual sessions with members of a couple in therapy.
• Peplau’s Interpersonal Relations Theory: The Working Phase is critical, as it involves moving past the "stranger" phase to build trust, identify goals, and implement interventions.
• Family Therapy: A primary goal is increasing a client's level of self-differentiation, allowing them to remain connected to the family without becoming "enmeshed".

Statistics in Research

When reviewing clinical data, remember these fundamental tests:

• Student’s t-test: Used to compare the means of two independent groups.
• ANOVA: Used when comparing the means of three or more groups.

Legal and Ethical Principles

• Nonmaleficence: The fundamental duty to "do no harm".
• Duty to Warn: If a patient makes a credible, specific threat toward an identifiable person, you must take immediate protective action and notify law enforcement.
• Informed Consent: This is waived during acute psychosis if there is an imminent safety risk and the patient lacks capacity.
• False Imprisonment: Blocking a voluntary patient from leaving a facility without a legal hold constitutes false imprisonment.

Board Pearl: Legal Rights Habeas Corpus is the legal writ that allows an involuntarily hospitalized patient to challenge their confinement in court to determine if the detention is lawful.