Commonly Prescribed Psychiatric Medications and Their Uses

Depression is a prevalent psychiatric disorder that is often managed by general practitioners with support from community mental health teams. The National Institute for Health and Care Excellence (NICE) recommends antidepressants as a first-line treatment for moderate to severe depression, alongside high-intensity psychological therapy. Selective serotonin reuptake inhibitors (SSRIs) such as citalopram are the preferred antidepressants for adults due to their better side-effect profile and lower risk of overdose. Fluoxetine is the only licensed antidepressant for children and adolescents and has the largest evidence base.

Tricyclic antidepressants like amitriptyline are an older class of antidepressants that are more toxic in overdose and commonly cause antimuscarinic effects at therapeutic doses. They are more commonly used in low doses for conditions such as neuropathic pain. Carbamazepine is commonly used in epilepsy and neuropathic pain and also plays a role as a mood stabilizer in bipolar disorder. Lithium is primarily used for treatment and prophylaxis in bipolar disorder and should be prescribed by specialists due to the need for dose titration to achieve a narrow therapeutic window. Phenelzine is a monoamine oxidase inhibitor, an older class of antidepressants with a wide range of side-effects and drug interactions. Patients on phenelzine should follow a low-tyramine diet to avoid an acute hypertensive crisis.

Understanding Common Psychiatric Medications and Their Uses

Understanding the Psychological Effects of Cocaine Use

Cocaine use can lead to a range of psychological and psychiatric problems, including delusional disorder. This disorder is characterized by grandiose ideas concerning one’s social standing or intellectual ability, which are far in excess of reality. Cocaine-induced hallucinations are also common, particularly of the auditory or tactile variety.

While some may mistake these symptoms for schizophrenia or a manic episode of bipolar disorder, it is important to consider the individual’s history of cocaine use. Cocaine intoxication can cause anxiety, agitation, euphoria, enlarged pupils, and palpitations, while severe intoxication can lead to delirium, hyperactivity, hyperthermia, and psychosis. Cocaine withdrawal, on the other hand, can cause fatigue, agitation, vivid and unpleasant dreams, increased appetite, and psychomotor retardation.

Overall, it is crucial to understand the potential psychological effects of cocaine use and seek appropriate treatment if necessary.

The Role of Hypothalamic-Pituitary Axes in Health and Disease

The hypothalamic-pituitary axes play a crucial role in maintaining homeostasis in the body. Among these axes, the hypothalamic-pituitary-adrenal (HPA) axis is particularly important in the pathophysiology of anxiety disorders. Overactivation of the HPA axis leads to the release of catecholamines, resulting in the fight or flight response. Environmental factors and genetics may contribute to the development of anxiety disorders, but the final common pathway is the dysregulation of the HPA axis.

The hypothalamic-pituitary-thyroid (HPT) axis is involved in thyroid disorders, such as hyperthyroidism and hypothyroidism. However, normal thyroid function rules out this axis as a cause of the patient’s symptoms.

The hypothalamic-pituitary-gonadal (HPG) axis is responsible for the release of sex hormones, such as oestrogen and testosterone. Disorders affecting the HPG axis can impact puberty and sexual development.

The hypothalamic-pituitary-prolactin (HPP) axis regulates the release of prolactin, which acts on the mammary glands. Medications can cause dysregulation of the HPP axis, resulting in hyperprolactinaemia or hypoprolactinaemia.

Finally, the hypothalamic-pituitary-somatotropic (HPS) axis is involved in the release of growth hormone and insulin-like growth factor 1. Dysregulation of the HPS axis can lead to growth hormone deficiency and Laron syndrome.

Understanding the role of these hypothalamic-pituitary axes is crucial in diagnosing and treating various health conditions.

Conversion disorder is a condition that often results in the loss of motor or sensory function and is believed to be triggered by stress.

Psychiatric Terms for Unexplained Symptoms

There are various psychiatric terms used to describe patients who exhibit symptoms for which no organic cause can be found. One such disorder is somatisation disorder, which involves the presence of multiple physical symptoms for at least two years, and the patient’s refusal to accept reassurance or negative test results. Another disorder is illness anxiety disorder, which is characterized by a persistent belief in the presence of an underlying serious disease, such as cancer, despite negative test results.

Conversion disorder is another condition that involves the loss of motor or sensory function, and the patient does not consciously feign the symptoms or seek material gain. Patients with this disorder may be indifferent to their apparent disorder, a phenomenon known as la belle indifference. Dissociative disorder, on the other hand, involves the process of ‘separating off’ certain memories from normal consciousness, and may manifest as amnesia, fugue, or stupor. Dissociative identity disorder (DID) is the most severe form of dissociative disorder and was previously known as multiple personality disorder.

Factitious disorder, also known as Munchausen’s syndrome, involves the intentional production of physical or psychological symptoms. Finally, malingering is the fraudulent simulation or exaggeration of symptoms with the intention of financial or other gain. Understanding these psychiatric terms can help healthcare professionals better diagnose and treat patients with unexplained symptoms.

Medications for Opioid Dependence and Withdrawal

Opioid dependence can be treated with medications under medical supervision. Methadone and buprenorphine are two options that can be used to substitute for illicit opioids. Buprenorphine should be given when the patient is experiencing withdrawal symptoms. Benzodiazepines like lorazepam and diazepam are used to treat withdrawal symptoms but not as a substitute for opioids. Lofexidine is also used to treat withdrawal symptoms. Naltrexone, an opioid antagonist, can be used to sustain abstinence in consenting patients.

Acute stress disorder is characterized by an acute stress reaction that occurs within four weeks of a traumatic event, while PTSD is diagnosed after four weeks have passed. Symptoms presented within two weeks would suggest acute stress disorder. Both acute stress disorder and PTSD share similar features, including re-experiencing, avoidance, hyperarousal, and emotional numbing. Re-experiencing symptoms may include flashbacks, nightmares, and repetitive and distressing intrusive images. Avoidance symptoms may involve avoiding people, situations, or circumstances associated with the traumatic event. Hyperarousal symptoms may include hypervigilance for threat, exaggerated startle response, sleep problems, irritability, and difficulty concentrating. Emotional numbing may result in a lack of ability to experience feelings and feeling detached.

Acute stress disorder is a condition that occurs within the first four weeks after a person has experienced a traumatic event, such as a life-threatening situation or sexual assault. It is characterized by symptoms such as intrusive thoughts, dissociation, negative mood, avoidance, and arousal. These symptoms can include flashbacks, nightmares, feeling disconnected from reality, and being hypervigilant.

To manage acute stress disorder, trauma-focused cognitive-behavioral therapy (CBT) is typically the first-line treatment. This type of therapy helps individuals process their traumatic experiences and develop coping strategies. In some cases, benzodiazepines may be used to alleviate acute symptoms such as agitation and sleep disturbance. However, caution must be taken when using these medications due to their addictive potential and potential negative impact on adaptation. Overall, early intervention and appropriate treatment can help individuals recover from acute stress disorder and prevent the development of more chronic conditions such as PTSD.

Obsessive-compulsive disorder (OCD) is characterized by the presence of obsessions and/or compulsions that can cause significant functional impairment and distress. Risk factors include family history, age, pregnancy/postnatal period, and history of abuse, bullying, or neglect. Treatment options include low-intensity psychological treatments, SSRIs, and more intensive CBT (including ERP). Severe cases should be referred to the secondary care mental health team for assessment and may require combined treatment with an SSRI and CBT or clomipramine as an alternative. ERP involves exposing the patient to an anxiety-provoking situation and stopping them from engaging in their usual safety behavior. Treatment with SSRIs should continue for at least 12 months to prevent relapse and allow time for improvement.

Patients who are taking a SSRI should not use triptans.

Selective serotonin reuptake inhibitors (SSRIs) are commonly used as the first-line treatment for depression. Citalopram and fluoxetine are the preferred SSRIs, while sertraline is recommended for patients who have had a myocardial infarction. However, caution should be exercised when prescribing SSRIs to children and adolescents. Gastrointestinal symptoms are the most common side-effect, and patients taking SSRIs are at an increased risk of gastrointestinal bleeding. Patients should also be aware of the possibility of increased anxiety and agitation after starting a SSRI. Fluoxetine and paroxetine have a higher propensity for drug interactions.

The Medicines and Healthcare products Regulatory Agency (MHRA) has issued a warning regarding the use of citalopram due to its association with dose-dependent QT interval prolongation. As a result, citalopram and escitalopram should not be used in patients with congenital long QT syndrome, known pre-existing QT interval prolongation, or in combination with other medicines that prolong the QT interval. The maximum daily dose of citalopram is now 40 mg for adults, 20 mg for patients older than 65 years, and 20 mg for those with hepatic impairment.

When initiating antidepressant therapy, patients should be reviewed by a doctor after 2 weeks. Patients under the age of 25 years or at an increased risk of suicide should be reviewed after 1 week. If a patient responds well to antidepressant therapy, they should continue treatment for at least 6 months after remission to reduce the risk of relapse. When stopping a SSRI, the dose should be gradually reduced over a 4 week period, except for fluoxetine. Paroxetine has a higher incidence of discontinuation symptoms, including mood changes, restlessness, difficulty sleeping, unsteadiness, sweating, gastrointestinal symptoms, and paraesthesia.

When considering the use of SSRIs during pregnancy, the benefits and risks should be weighed. Use during the first trimester may increase the risk of congenital heart defects, while use during the third trimester can result in persistent pulmonary hypertension of the newborn. Paroxetine has an increased risk of congenital malformations, particularly in the first trimester.

Bulimia nervosa involves purging behaviors that go beyond just vomiting, and can also include the use of laxatives or diuretics, as well as excessive exercising. Binging episodes are followed by these purgative behaviors, which occur on average once a week and do not necessarily happen after every meal. Fasting, which involves restricting or stopping food intake, is more commonly associated with anorexia nervosa.

Bulimia Nervosa: An Eating Disorder Characterized by Binge Eating and Purging

Bulimia nervosa is a type of eating disorder that involves recurrent episodes of binge eating followed by purging behaviors such as self-induced vomiting, misuse of laxatives or diuretics, fasting, or excessive exercise. The DSM 5 diagnostic criteria for bulimia nervosa include recurrent episodes of binge eating, a sense of lack of control over eating during the episode, and recurrent inappropriate compensatory behaviors to prevent weight gain. These behaviors occur at least once a week for three months and are accompanied by an undue influence of body shape and weight on self-evaluation.

Management of bulimia nervosa involves referral for specialist care and the use of bulimia-nervosa-focused guided self-help or individual eating-disorder-focused cognitive behavioral therapy (CBT-ED). Children should be offered bulimia-nervosa-focused family therapy (FT-BN). While pharmacological treatments have a limited role, a trial of high-dose fluoxetine is currently licensed for bulimia. It is important to seek appropriate care for bulimia nervosa to prevent the physical and psychological consequences of this eating disorder.

If sertraline, a first-line SSRI, is ineffective or not well-tolerated for treating GAD, alternative options include trying a different SSRI like paroxetine or escitalopram, or an SNRI like duloxetine or venlafaxine. In Maxine’s case, since sertraline did not work, venlafaxine, an SNRI, would be a suitable option. Bupropion is primarily used for smoking cessation but may be considered off-label for depression treatment if other options fail. Mirtazapine is a NaSSA used for depression, not GAD. Pregabalin can be used if SSRIs or SNRIs are not suitable, and propranolol can help with acute anxiety symptoms but is not a specific treatment for GAD.

Anxiety is a common disorder that can manifest in various ways. According to NICE, the primary feature is excessive worry about multiple events associated with heightened tension. It is crucial to consider potential physical causes when diagnosing anxiety disorders, such as hyperthyroidism, cardiac disease, and medication-induced anxiety. Medications that may trigger anxiety include salbutamol, theophylline, corticosteroids, antidepressants, and caffeine.

NICE recommends a step-wise approach for managing generalised anxiety disorder (GAD). This includes education about GAD and active monitoring, low-intensity psychological interventions, high-intensity psychological interventions or drug treatment, and highly specialist input. Sertraline is the first-line SSRI for drug treatment, and if it is ineffective, an alternative SSRI or a serotonin-noradrenaline reuptake inhibitor (SNRI) such as duloxetine or venlafaxine may be offered. If the patient cannot tolerate SSRIs or SNRIs, pregabalin may be considered. For patients under 30 years old, NICE recommends warning them of the increased risk of suicidal thinking and self-harm and weekly follow-up for the first month.

The management of panic disorder also follows a stepwise approach, including recognition and diagnosis, treatment in primary care, review and consideration of alternative treatments, review and referral to specialist mental health services, and care in specialist mental health services. NICE recommends either cognitive behavioural therapy or drug treatment in primary care. SSRIs are the first-line drug treatment, and if contraindicated or no response after 12 weeks, imipramine or clomipramine should be offered.