After benzodiazepines were introduced in the 1960s as safe anxiolytic and hypnotic agents, their use increased rapidly worldwide. By 1977, benzodiazepines were increasingly prescribed not only for anxiety and insomnia but also for agitation, seizures, muscle spasms, and as premedication for anesthesia. Common examples of benzodiazepines include lorazepam, clonazepam, and diazepam.
Indications of benzodiazepines
- Anxiety
Benzodiazepines are used for the short-term management of generalized anxiety disorder, particularly during the acute phase of the condition. Their use should be reserved for severe cases to minimise the risk of dependence. These medicines may be used either as monotherapy or in combination with antidepressants, such as selective serotonin reuptake inhibitors (SSRIs), to provide rapid relief of anxiety symptoms. Clinical guidelines emphasise that benzodiazepines should be prescribed at the lowest effective dose and for the shortest possible duration, with a recommended maximum of four weeks. However, a small subset of patients with severely disabling anxiety may require long-term benzodiazepine treatment following a thorough clinical assessment by doctors.
- Hypnosis
Benzodiazepines are commonly prescribed as anxiolytics due to their effectiveness in alleviating agitation and tension. In certain situations, they are also utilized as short-term hypnotics to address sleep disturbances. Before initiating treatment with hypnotic medicines such as benzodiazepines, healthcare providers typically rule out underlying causes, for example, pain, dyspnea, or excessive caffeine consumption. Furthermore, alternative therapeutic approaches, including behavioural interventions such as cognitive behavioural therapy for insomnia (CBT-I), can also be considered diligently prior to prescribing these medicines.
- Depression
Benzodiazepines may be used as an adjunct to antidepressant treatment in patients with major depressive disorder who present with anxiety, agitation, and or insomnia. To minimise the risk of dependence, their use should be limited to a short duration, typically no longer than two to four weeks.
- Psychosis
Benzodiazepines are frequently used for rapid tranquilization, either alone or in combination with an antipsychotic. However, there is no evidence supporting the routine augmentation of antipsychotics with benzodiazepines in the management of schizophrenia. Their use is therefore generally limited to short-term sedation in acutely agitated patients.
Possible side effects of benzodiazepines
Benzodiazepines can cause a range of side effects, including headaches, blurred vision, gastrointestinal disturbances, jaundice, confusion, and paradoxical excitement, in which the intended calming effect is replaced by increased agitation, anxiety, or hyperactivity. They may also impair cognitive function, and long-term use has been associated with deficits in memory, attention, and processing speed. On the other hand, adverse effects of benzodiazepines may include respiratory depression, impaired driving ability, loss of self-control, aggressive behaviour, and anterograde amnesia.In elderly patients, the use of benzodiazepines increases the risk of hip fractures by at least 50%, likely due to an increased risk of falls, particularly when high doses are used or when benzodiazepine therapy is newly initiated. Elderly individuals are advised to empty their bladder before bedtime as a measure to reduce the likelihood of falls during nighttime trips to the bathroom.
Benzodiazepines dependence and tolerance
As the use of benzodiazepines became more widespread, prolonged use without prescriber supervision increasingly occurred, contributing to both tolerance and benzodiazepine dependence. With continued exposure, tolerance may develop, whereby progressively higher doses are required to achieve the same therapeutic effect, reducing their effectiveness in the management of insomnia or anxiety.
In contrast, benzodiazepine dependence refers to a physiological or psychological reliance on the medicine, in which continued use is driven primarily by the need to avoid withdrawal symptoms rather than to achieve therapeutic benefit. Dependence may develop following long-term use at low daily doses, as well as from high-dose use, illicit consumption, or intermittent use over time. Prolonged benzodiazepine use is therefore discouraged due to the increased risk of dependence and a range of adverse effects, some of which may only become fully apparent after discontinuation.
Withdrawal symptoms of benzodiazepines
The majority of patients experience withdrawal symptoms following the discontinuation of benzodiazepines. The severity and presentation of these withdrawal symptoms can vary widely. Some common symptoms include anxiety, insomnia, mood instability, tremor, headache, muscle stiffness, nausea, and sensory hypersensitivity.
Patients should be cautioned against stopping benzodiazepines abruptly, as this can trigger severe withdrawal symptoms, including seizures, which may be fatal. Therefore, medical supervision and gradual dose tapering are essential to ensure the safe and effective management of withdrawal symptoms during benzodiazepine treatment. Mental state often improves once withdrawal symptoms have subsided.
Gradual dose reduction (tapering)
Gradual dose reduction, or tapering, of benzodiazepines can help minimise the intensity of withdrawal symptoms by prolonging the discontinuation process, making it more manageable for patients. The tapering schedule is tailored to each patient’s tolerability, and patients are encouraged to consult a healthcare provider if withdrawal symptoms become difficult to manage. In such cases, adjustments may include temporarily increasing the dose, allowing a stabilization period, or implementing a slower tapering process. Some patients may require extended intervals between dose reductions, ranging from several months to years, to achieve successful discontinuation of treatment.
Stopping benzodiazepines
Stopping benzodiazepines too abruptly can lead to significant difficulties for patients. The tapering approach depends on several factors, including the patient’s diagnosis, the type of benzodiazepine used, the dose, and the duration of use. Weaning a patient off benzodiazepines is a gradual process that requires time and careful co-management with adjunctive treatments to make the experience more tolerable. For example, effective management of insomnia and the use of cognitive behavioural therapy (CBT) for panic disorder during the tapering period are more likely to result in successful outcomes. Other non-pharmacological coping strategies, such as breathing exercises, regular physical activity, engaging in hobbies, and keeping a diary, may also be beneficial for patients.In conclusion, benzodiazepines provide important therapeutic benefits but are associated with risks of tolerance, dependence, and withdrawal symptoms when used long-term or without close supervision from healthcare professionals. Professional guidance on appropriate treatment duration and dose tapering is essential to minimise these risks and to ensure safe and effective outcomes for patients.
REFERENCES:
- Steven L. Dubovsky, Dori Marshall; Benzodiazepines Remain Important Therapeutic Options in Psychiatric Practice. Psychother Psychosom 23 August 2022; 91 (5): 307–334. https://doi.org/10.1159/000524400
- Taylor, D.M., Barnes, T.R.E., & Young, A.H. (2021). The Maudsley Prescribing Guidelines in Psychiatry Fourteenth Edition. Wiley.
Ministry of Health Malaysia. (2019). Clinical Practice Guidelines: Management of Major Depressive Disorder Second Edition 2019. Ministry of Heath Malaysia. https://www.acadmed.org.my/view_file.cfm?fileid=250
This article was prepared by Liew Ming Yan (Pharmacist) from Hospital Bahagia Ulu Kinta for Bahagian Amalan dan Perkembangan Farmasi (BAPF), KKM x The Malaysian Medical Gazette Series. It is hoped that this collaboration will help propagate information regarding medication to the general public.