Can abruptly stopping chronic zolpidem and lorazepam cause withdrawal-related CNS hyperexcitability, confusion, insomnia, and cognitive symptoms?

Abrupt cessation of chronic lorazepam and zolpidem removes two overlapping GABA-A–mediated sedative effects. In a 77-year-old, new insomnia, agitation, confusion, or altered cognition after stopping both drugs should be treated as potentially clinically significant withdrawal, while also prompting assessment for other acute causes of delirium.

Clinical withdrawal effects

• CNS hyperexcitability and insomnia: These outcomes are well supported directionally. Abrupt lorazepam withdrawal can cause severe sedative-hypnotic withdrawal, including delirium and seizures. Zolpidem withdrawal can cause agitation, tremor, delirium, and rarely seizures. Zolpidem discontinuation also produces rebound insomnia—often greatest on the first night and tending toward baseline within 1–2 nights at standard doses.
• Confusion and cognitive symptoms: Confusion, delirium, and cognitive disorganization are clinically plausible, since either medication can cause neuropsychiatric withdrawal manifestations. Direct studies of chronic, simultaneous lorazepam–zolpidem cessation are limited, but the expected effects are consistent with withdrawal from both agents.

Mechanistic rationale

• Both drugs positively modulate GABA-A receptors. Chronic exposure can produce adaptive reliance on inhibitory GABAergic signaling; abruptly removing both agents may create a relative loss of inhibition, increasing neuronal arousal, insomnia, tremor, agitation, and delirium risk.
• More substantial zolpidem withdrawal is associated with prolonged use, rapid dose reduction, dependence, or high doses. Abrupt benzodiazepine discontinuation is particularly concerning in regularly treated patients.

Safety implications

• Delirium and seizures are recognized serious withdrawal outcomes. Seizures from zolpidem withdrawal are uncommon at therapeutic doses but documented, whereas they are an established complication of abrupt benzodiazepine withdrawal.
• Acute cognitive change also needs assessment for medical, neurologic, substance-related, and medication-related causes.

Bottom line

• Abrupt concurrent discontinuation can credibly cause withdrawal-related hyperexcitability and insomnia; confusion and cognitive symptoms are also plausible and clinically important. Severe agitation, delirium, autonomic instability, seizure, or reduced consciousness requires urgent medical evaluation.