Acute withdrawal signs and symptoms associated with benzodiazepines have
included abnormal involuntary movements, anxiety, blurred vision,
depersonalization, depression, derealization, dizziness, fatigue, gastrointestinal
adverse reactions (e.g., nausea, vomiting, diarrhea, weight loss, decreased
appetite), headache, hyperacusis, hypertension, irritability, insomnia, memory
impairment, muscle pain and stiffness, panic attacks, photophobia, restlessness,
tachycardia, and tremor. More severe acute withdrawal signs and symptoms,
including life-threatening reactions, have included catatonia, convulsions,
delirium tremens, depression, hallucinations, mania, psychosis, seizures, and
suicidality.
Protracted Withdrawal Syndrome
Protracted withdrawal syndrome associated with benzodiazepines is
characterized by anxiety, cognitive impairment, depression, insomnia,
formication, motor symptoms (e.g., weakness, tremor, muscle twitches),
paresthesia, and tinnitus that persists beyond 4 to 6 weeks after initial
benzodiazepine withdrawal. Protracted withdrawal symptoms may last weeks
to more than 12 months. As a result, there may be difficulty in differentiating
withdrawal symptoms from potential re-emergence or continuation of
symptoms for which the benzodiazepine was being used; however, little
tolerance develops to the amnestic reactions and other cognitive impairments
caused by benzodiazepines.
Tolerance
Tolerance to Valium may develop from continued therapy. Tolerance is a
physiological state characterized by a reduced response to a drug after repeated
administration (i.e., a higher dose of a drug is required to produce the same
effect that was once obtained at a lower dose). Tolerance to the therapeutic
effect of Valium may develop; however, little tolerance develops to the
amnestic reactions and other cognitive impairments caused by benzodiazepines.
OVERDOSAGE
Overdosage of benzodiazepines is characterized by central nervous system
depression ranging from drowsiness to coma. In mild to moderate cases,
symptoms can include drowsiness, confusion, dysarthria, lethargy, hypnotic
state, diminished reflexes, ataxia, and hypotonia. Rarely, paradoxical or
disinhibitory reactions (including agitation, irritability, impulsivity, violent
behavior, confusion, restlessness, excitement, and talkativeness) may occur. In
severe overdosage cases, patients may develop respiratory depression and
coma. Overdosage of benzodiazepines in combination with other CNS
depressants (including alcohol and opioids) may be fatal (see WARNINGS:
Dependence and Withdrawal Reactions). Markedly abnormal (lowered or
elevated) blood pressure, heart rate, or respiratory rate raise the concern that
additional drugs and/or alcohol are involved in the overdosage.