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Restoril Side Effects

Generic Name: temazepam

Note: This page contains side effects data for the generic drug temazepam. It is possible that some of the dosage forms included below may not apply to the brand name Restoril.

In Summary

More frequent side effects include: dizziness, insomnia, lethargy, and irritability. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to temazepam: oral capsule, oral tablet

As well as its needed effects, temazepam (the active ingredient contained in Restoril) may cause unwanted side effects that require medical attention.

Major Side Effects

If any of the following side effects occur while taking temazepam, check with your doctor immediately:

Less common:
  • False or unusual sense of well-being
  • fear or nervousness
  • mood or mental changes
  • 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, sex organs
  • loss of appetite
  • loss of memory
  • nightmares
  • problems with memory
  • seeing, hearing, or feeling things that are not there
  • shakiness and unsteady walk
  • tightness in the chest
  • 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

If any of the following symptoms of overdose occur while taking temazepam, get emergency help immediately:

Symptoms of overdose:
  • Blurred vision
  • change in consciousness
  • confusion
  • decreased or absent reflexes
  • difficult or troubled breathing
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • irregular, fast, slow, or shallow breathing
  • loss of consciousness
  • pale or blue lips, fingernails, or skin
  • sleepiness or unusual drowsiness
  • unusual tiredness or weakness

Minor Side Effects

Some temazepam side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned 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
  • Backache
  • burning eyes

For Healthcare Professionals

Applies to temazepam: oral capsule

Nervous system

Common (1% to 10%): Drowsiness, headache, nervousness, dizziness, vertigo
Uncommon (0.1% to 1%): Ataxia, equilibrium loss, tremor
Rare (less than 0.1%): Amnesia
Frequency not reported: Sedation, reduced alertness, confusion, disorientation, muzziness, sciatica, faintness, loss of taste, extrapyramidal symptoms, dysarthria/slurred speech, convulsions/seizures, disinhibition, coma, unsteadiness[Ref]


Common (1% to 10%): Fatigue, lethargy, hangover, weakness,
Frequency not reported: Asthenia, hypothermia[Ref]


Common (1% to 10%): Anxiety, depression, euphoria, nightmare
Uncommon (0.1% to 1%): Increased dreaming
Rare (less than 0.1%): Hallucinations, paradoxical reactions (including overstimulation, agitation, acute rage)
Frequency not reported: Numbed emotions, unmasking of depression, vivid dreams, suicidal ideation/attempt[Ref]


Frequency not reported: Elevated serum alkaline phosphatase, elevated AST, elevated bilirubin, jaundice[Ref]


Common (1% to 10%): Nausea, dry mouth, diarrhea, abdominal discomfort
Uncommon (0.1% to 1%): Vomiting
Frequency not reported: Gastrointestinal upset, constipation[Ref]


Frequency not reported: Thrombocytopenia, agranulocytosis, pancytopenia[Ref]


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


Uncommon (0.1% to 1%): Palpitations
Frequency not reported: Tachycardia, hypotension, lowering in blood pressure[Ref]


Uncommon (0.1% to 1%): Hyperhidrosis
Frequency not reported: Macular rash, pruritus, alopecia[Ref]


Frequency not reported: SIADH (syndrome of inappropriate antidiuretic hormone) secretion, hyponatremia[Ref]


The most commonly reported side effects were drowsiness, headache, fatigue, and nervousness.[Ref]


Frequency not reported: Change in libido, impotence, decreased orgasm[Ref]


Frequency not reported: Leukocytosis[Ref]


Uncommon (0.1% to 1%): Anorexia[Ref]


Uncommon (0.1% to 1%): Backache
Frequency not reported: Muscle weakness, leg cramps, weakness[Ref]


Common (1% to 10%): Blurred vision
Uncommon (0.1% to 1%): Burning eyes
Rare (less than 0.1%): Horizontal nystagmus
Frequency not reported: Visual disturbance (including diplopia)[Ref]


Frequency not reported: Elevated BUN, proteinuria[Ref]


Uncommon (0.1% to 1%): Dyspnea
Frequency not reported: Respiratory depression, breathlessness, apnea, worsening of sleep apnea, worsening of obstructive pulmonary disease[Ref]


1. "Product Information. Restoril (temazepam)." Sandoz Pharmaceuticals Corporation, East Hanover, NJ.

2. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0

3. Cerner Multum, Inc. "Australian Product Information." O 0

It is possible that some side effects of Restoril may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.