Sleeping Tablets and Sedatives: Using Them Safely

Sedative-hypnotic medicines — benzodiazepines such as diazepam, lorazepam, alprazolam and clonazepam, and the so-called Z-drugs such as zolpidem, zopiclone and zaleplon — are among the most prescribed drugs in the world. They work well and quickly for insomnia, anxiety, muscle spasm, alcohol withdrawal, seizures and procedural sedation. They also carry well-documented risks: tolerance, dependence, falls, memory impairment, driving impairment, and dangerous interactions with alcohol and opioids. Expert guidance on rational use focuses on balancing those benefits and risks — the aim is not to avoid these drugs, but to prescribe them for the right person, for the right length of time, with a plan for stopping.

When they are appropriate

For insomnia, guidelines recommend cognitive behavioural therapy for insomnia (CBT-I) as first-line treatment, with medication used when CBT-I is ineffective or unavailable — and used short-term, generally a few days to a few weeks rather than months, at the lowest effective dose, and intermittently rather than every night. For anxiety disorders, they are useful for short-term relief at the start of treatment while longer-term medicines such as SSRIs take effect, and for acute situational anxiety; they are not the long-term treatment. They have established roles in alcohol withdrawal, acute agitation, status epilepticus, muscle spasm, and sedation before procedures.

How dependence develops

Tolerance — needing more for the same effect — can begin within weeks of regular use. Physiological dependence means that stopping abruptly produces rebound insomnia, anxiety, tremor, perceptual disturbance and, with higher doses or longer use, seizures. Risk is higher with higher doses, longer duration, shorter-acting and high-potency agents, a history of substance use disorder, and use in older people. Dependence can develop in anyone, including people who never exceed the prescribed dose — which is why duration limits and review matter more than dose policing.

Special cautions

In older people these drugs are a leading cause of falls, fractures, confusion and car crashes, and they are best avoided or used at reduced doses for very short periods. They must not be combined with alcohol or opioids — this combination is a common cause of fatal overdose — and they interact with many other medicines. They can impair driving the following morning, particularly longer-acting agents and Z-drugs taken too late at night. They are generally avoided in pregnancy and breastfeeding, in people with sleep apnoea or significant respiratory disease, and in people with a history of substance misuse unless there is a specific, supervised indication.

Stopping safely

Never stop a benzodiazepine or Z-drug abruptly after regular use of more than a few weeks. The standard approach is a gradual taper — reducing the dose in small steps, typically by around 10–25% every one to two weeks, sometimes switching to a longer-acting equivalent such as diazepam to make smaller reductions practical, and slowing the taper if withdrawal symptoms emerge. Withdrawal symptoms can include rebound sleep disturbance, anxiety, sweating, tremor, sensory hypersensitivity and, rarely, seizures. Combining the taper with CBT-I substantially improves the chance of staying off the medicine, because it treats the insomnia that prompted it in the first place.

Better long-term sleep care

Sleep hygiene and CBT-I outperform medication over the long term. Core elements are consistent wake times, getting out of bed when awake rather than lying there, limiting time in bed to actual sleep time, avoiding caffeine after midday and alcohol in the evening, addressing pain and reflux, screening for sleep apnoea when snoring and daytime sleepiness are present, and treating the anxiety or mood disorder that often sits underneath chronic insomnia. If you are prescribed a sleeping tablet, ask three questions: how long should I take it, what happens when I stop, and what is the plan besides the tablet?