Temazepam Side Effects

Medically reviewed by Drugs.com. Last updated on Dec 24, 2022.

Summary

More frequently reported side effects include: dizziness, insomnia, lethargy, and irritability. Continue reading for a comprehensive list of adverse effects.

Applies to temazepam: oral capsule.

Serious side effects of Temazepam

Along with its needed effects, temazepam may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking temazepam:

Less common

• False or unusual sense of well-being
• fear or nervousness
• mood or mental changes

Rare

• Chest tightness
• difficult or labored breathing
• fast, irregular, pounding, or racing heartbeat or pulse
• large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
• loss of appetite
• loss of memory
• nightmares
• problems with memory
• seeing, hearing, or feeling things that are not there
• shakiness and unsteady walk
• uncontrolled eye movements
• unsteadiness, trembling, or other problems with muscle control or coordination
• unusual excitement, nervousness, restlessness, or irritability
• weight loss

Incidence not known

• Muscle cramps
• seizures
• shakiness in the legs, arms, hands, or feet
• stomach cramps
• sweating
• trembling or shaking of the hands or feet
• vomiting

Get emergency help immediately if any of the following symptoms of overdose occur while taking temazepam:

Symptoms of overdose

• Agitation
• blurred vision
• change in consciousness
• changes in patterns and rhythms of speech
• confusion
• decreased or absent reflexes
• difficult or trouble breathing
• dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
• irregular, fast, slow, or shallow breathing
• loss of consciousness
• loss of strength or energy
• nightmares
• pale or blue lips, fingernails, or skin
• shakiness and unsteady walk
• sleepiness or unusual drowsiness
• slurred speech
• trouble speaking
• unsteadiness, trembling, or other problems with muscle control or coordination
• unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
• unusual excitement, nervousness, restlessness, or irritability

Other side effects of Temazepam

Some side effects of temazepam may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

• Diarrhea
• dry mouth
• feeling of constant movement of self or surroundings
• headache
• nausea
• sensation of spinning
• unusual dullness or feeling of sluggishness

Rare

• Backache
• burning eyes

For Healthcare Professionals

Applies to temazepam: oral capsule.

General

The most commonly reported side effects included drowsiness, headache, and fatigue.^[Ref]

Nervous system

Lightheadedness, slurred speech, and unsteadiness usually occur at the start of treatment and disappear with repeated doses.^[Ref]

Common (1% to 10%): Dizziness, drowsiness, hangover, headache, lethargy, sedation, vertigo

Uncommon (0.1% to 1%): Ataxia, equilibrium loss, faintness, muzziness, sciatica, taste loss, tremor

Rare (0.01% to 0.1%): Dysarthria

Frequency not reported: Amnesia, anterograde amnesia, coma, convulsions, daytime drowsiness, epileptic seizures, extrapyramidal symptoms, extremity tingling, horizontal nystagmus, hypersensitivity to light/noise/physical contact, impaired concentration, lightheadedness, numbness, oversedation, perceptual disturbances, reduced alertness, seizures, slurred speech, unsteadiness^[Ref]

Psychiatric

Common (1% to 10%): Anxiety, confusion, depression, euphoria, nervousness, nightmares

Uncommon (0.1% to 1%): Decreased orgasm, disorientation, increased dreaming, irritability, libido changes, unmasking of depression, vivid dreams

Rare (0.01% to 0.1%): Restless sleep

Frequency not reported: Abuse, aggressiveness/aggression, agitation, broken sleep (with vivid dreams), confusional states, delusion, depersonalization, dependence, derealization, disinhibition, excitement, extreme anxiety, hallucinations, hostility, inappropriate behavior, insomnia, mood changes, numbed emotions, other adverse behavioral effects, overstimulation, physical dependence, psychological dependence, psychoses, psychotic manifestations, rage, rebound insomnia, restlessness, sexual arousal, sleep disturbance, stimulation, suicidal attempt, suicidal ideation, tension, withdrawal effects/symptoms^[Ref]

Dependence and numbed emotions usually occur at the start of treatment and disappear with repeated doses.^[Ref]

Gastrointestinal

Common (1% to 10%): Abdominal discomfort, diarrhea, dry mouth, nausea

Uncommon (0.1% to 1%): Gastrointestinal upset, vomiting

Rare (0.01% to 0.1%): Salivation changes

Frequency not reported: Abdominal cramps, constipation, gastrointestinal disturbances^[Ref]

Other

Common (1% to 10%): Fatigue, weakness

Uncommon (0.1% to 1%): Asthenia

Frequency not reported: Falls, hyperacusis, hypothermia, paradoxical reactions, rebound phenomenon, tinnitus^[Ref]

Ocular

Common (1% to 10%): Blurred vision

Uncommon (0.1% to 1%): Burning eyes

Rare (0.01% to 0.1%): Visual disturbances

Frequency not reported: Diplopia/double vision, photophobia^[Ref]

Double vision usually occurs at the start of treatment and disappears with repeated doses.^[Ref]

Dermatologic

Uncommon (0.1% to 1%): Allergic skin reactions, hyperhidrosis, macular rash, pruritus

Rare (0.01% to 0.1%): Skin reactions

Frequency not reported: Alopecia, sweating^[Ref]

Hematologic

Uncommon (0.1% to 1%): Increased neutrophils, leukocytosis

Rare (0.01% to 0.1%): Blood disorders, blood dyscrasias

Frequency not reported: Agranulocytosis, pancytopenia, thrombocytopenia^[Ref]

Hepatic

Uncommon (0.1% to 1%): Increased AST, increased bilirubin

Rare (0.01% to 0.1%): Abnormal liver function, jaundice

Frequency not reported: Increased liver enzymes^[Ref]

Genitourinary

Uncommon (0.1% to 1%): Impotence, proteinuria

Rare (0.01% to 0.1%): Incontinence, urinary retention^[Ref]

Cardiovascular

Uncommon (0.1% to 1%): Palpitations, tachycardia

Rare (0.01% to 0.1%): Hypotension

Frequency not reported: Lowering in blood pressure, mild systolic hypertension, orthostatic hypotension^[Ref]

Musculoskeletal

Uncommon (0.1% to 1%): Backache, leg cramps

Rare (0.01% to 0.1%): Impaired muscular function

Frequency not reported: Muscle pain, muscle weakness^[Ref]

Muscle weakness usually occurs at the start of treatment and disappears with repeated doses.^[Ref]

Respiratory

Respiratory depression usually occurs at the start of treatment and disappears with repeated doses.^[Ref]

Uncommon (0.1% to 1%): Breathlessness, dyspnea

Frequency not reported: Apnea, respiratory depression, worsening of obstructive pulmonary disease, worsening of sleep apnea^[Ref]

Metabolic

Uncommon (0.1% to 1%): Anorexia, increased serum alkaline phosphatase

Frequency not reported: Hyponatremia, loss of appetite^[Ref]

Renal

Uncommon (0.1% to 1%): Increased blood urea nitrogen^[Ref]

Hypersensitivity

Rare (0.01% to 0.1%): Fatal anaphylaxis

Frequency not reported: Hypersensitivity reactions, severe anaphylactic reaction, severe anaphylactoid reaction^[Ref]

Endocrine

Frequency not reported: Syndrome of inappropriate antidiuretic hormone secretion (SIADH)^[Ref]

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

Medical Disclaimer