Comprehensive Nursing Pharmacology and Ethics for Psychiatric Care

Benzodiazepines for Anxiety Management

Benzodiazepines are used for the short-term treatment of anxiety disorders and are characterized by a rapid onset of action, typically working within $30\,\text{min}$. Due to their pharmacology, they are often prescribed on a PRN (as needed) basis. However, clinicians must be wary of their significant addiction potential. Abrupt withdrawal from these medications can lead to serious complications, including seizures. In clinical practice, Benzodiazepines can be utilized as a bridge therapy until an SSRI (Selective Serotonin Reuptake Inhibitor) reaches therapeutic levels, at which point the patient is slowly tapered off the benzodiazepine to discontinue (transcript notation: "Slowley get one to Ducial").

The specific drugs in this class include Clonazepam, Lorazepam, Diazepam, and Alprazolam. Students can use the mnemonic "Crazy little dogs attack" to recall these: Clonazepam, Diazepam, Alprazolam, and Lorazepam. Associated notes include the terms "Ben crazy" and "Anxiety" specifically linked to these medications.

Antidepressants for Anxiety and Long-Term Use

While Benzodiazepines are for short-term relief, antidepressants are the standard for long-term anxiety management. SSRIs are considered the "golden standard" and first-line treatment. SNRIs (Serotonin and Norepinephrine Reuptake Inhibitors) used for anxiety include Duloxetine and Venlafaxine, which can be remembered by the mnemonic "Devils Vault."

Buspirone is another option for anxiety. It takes several weeks to reach therapeutic effectiveness and must be dosed mindfully, often in conjunction with an SSRI. A major advantage of Buspirone is that it is safe, lacks withdrawal symptoms, and possesses no potential for abuse, tolerance, or dependence. It has serotonin qualities. Side effects that may limit its use include nausea, vomiting, and dizziness. The transcript mentions a dose related to "100" in the context of these limitations.

Clinical Principles of Antidepressant Therapy

Antidepressant effects do not occur immediately; initial effects typically develop after $1\text{ to }3\,\text{weeks}$, with a maximal response occurring at the $12\,\text{week}$ mark. There is a critical Black Box warning regarding an increase in suicidal tendencies during early treatment. This risk of self-harm increases as patients begin feeling better and experience increased energy before their mood fully stabilizes.

Activation concerns are also prominent in antidepressant therapy. If a patient is misdiagnosed with depression when they actually have Bipolar I disorder, the administration of an antidepressant can cause them to become manic. This requires careful screening for bipolar history before initiating treatment.

Selective Serotonin Reuptake Inhibitors (SSRIs)

SSRIs are the first-line treatments for both depression and anxiety. This group includes Fluoxetine, Sertraline, Fluvoxamine, Paroxetine, Citalopram, and Escitalopram. Several mnemonics aid in memory: "Sydney Escaped Flu" (Sertraline, Escitalopram, Fluoxetine) and "Some people can escape fucking flu" (Sertraline, Paroxetine, Citalopram, Escitalopram, Fluvoxamine, Fluoxetine).

Side effects of SSRIs include sexual dysfunction, decreased libido, and insomnia during the day. A significant danger is Serotonin Syndrome, which can occur when a patient is placed on two agents that both affect serotonin (e.g., an SSRI and an SNRI or St. John's Wort). To prevent this, a minimum $14\text{-day}$ wash period is required when switching to or from an SSRI. St. John's Wort is explicitly noted as not FDA approved and a risk factor for Serotonin Syndrome.

Serotonin and Norepinephrine Reuptake Inhibitors (SNRIs)

SNRIs target both serotonin and norepinephrine levels. The primary drugs in this category are Desvenlafaxine, Duloxetine, Venlafaxine, and Levomilnacipran. The mnemonic "Very Dumb doctors lecture" (Venlafaxine, Duloxetine, Desvenlafaxine, Levomilnacipran) is provided for these meds. Side effects include insomnia, hypertension (as these drugs can raise blood pressure), sexual dysfunction, and sweating. Clinical guidance suggests taking these with food, and if they are extended-release formulations, they must be swallowed full.

Tricyclic Antidepressants (TCAs)

The Tricyclic Antidepressants include Amitriptyline, Nortriptyline, Clomipramine, Imipramine, and Doxepin. The mnemonic "A nice cat is dreamy" represents Amitriptyline, Nortriptyline, Clomipramine, Imipramine, and Doxepin. These medications should be administered at bedtime to reduce the impact of daytime sedation.

TCAs are associated with several significant side effects, including orthostatic hypotension, increased body temperature, and anticholinergic effects. Anticholinergic progression is described as: "Blind as a bat" (mydriasis or dilated pupils), "Dry as a bone" (dry mouth, dry eyes, decreased sweat), "Red as a beet" (flushed face), and "Mad as a hatter" (delirium, which is the opposite of "Dumbers"). The most dangerous adverse effect is cardiac toxicity. In cases of TCA poisoning, treatment with sodium bicarbonate remains the standard of care.

Monoamine Oxidase Inhibitors (MAOIs)

MAOIs are rarely used because of their extensive side-effect profile and strict requirements. The drugs include Isocarboxazid, Phenelzine, Tranylcypromine, and Selegiline. The mnemonics provided are "Please stop Tyler" (Phenelzine, Selegiline, Isocarboxazid, Tranylcypromine) and "One clean to one gooder Selena."

A major risk with MAOIs is a hypertensive crisis resulting from interaction with dietary tyramine. Prevention requires avoiding aged meats, bananas, smoked fish, cheese, wine, and beer. If a crisis occurs, treatment involves intravenous vasodilators such as Labetalol, Sodium nitroprusside, or Phentolamine. MAOIs should not be taken with anything else due to high reactivity and risk of Serotonin Syndrome.

Atypical Antidepressants following Bupropion

Bupropion (Wellbutrin) is an atypical antidepressant that inhibits the uptake of norepinephrine and dopamine. Its antidepressant effects are delayed, beginning at $1\text{ to }3\,\text{weeks}$. It can be given with Paroxetine (an SSRI) to augment therapeutic effects. Bupropion is also used to assist with smoking cessation.

Advantages of Bupropion include no weight gain, no sexual dysfunction, and no sedation. However, it should not be given to individuals with high anxiety or those with bulimia/anorexia, as it lowers the seizure threshold.

Serotonin Syndrome and Treatment Modalities

Serotonin Syndrome occurs when there is too much serotonin in the system, often appearing within $72\,\text{hours}$ after treatment begins. Symptoms include tremors, fever, and confusion. If the medication is not discontinued, the condition can lead to death. It typically resolves spontaneously after discontinuing the offending drug. High risk occurs with concurrent use of MAOIs and other agents that raise serotonin levels. Clinicians should start at low doses and evaluate side effects carefully.

Electroconvulsive Therapy (ECT) is used for moderate or severe depression that has not been successful with medication or therapy. Usually, $4\text{ to }12$ treatments are administered, followed by a transition to antidepressants. Cognitive Behavioral Therapy (CBT) is considered the "golden standard" treatment, focusing on identifying negative thoughts with a therapist and figuring out how to make things more positive.

Bioethical Principles in Healthcare

Nursing and healthcare practice are guided by several core ethical principles:

1. Autonomy: Respecting the patient's right to decide and their independence.
2. Beneficence: The duty to do good.
3. Nonmaleficence: The duty to do no harm.
4. Justice: Ensuring fair care for all individuals.
5. Veracity: The obligation to tell the truth.
6. Fidelity: Keeping promises and the commitment to provide care.