Diazepam Injection Side Effects Center

Last updated on RxList: 10/7/2021
Diazepam Injection Side Effects Center

What Is Diazepam Injection?

Diazepam Injection (brand name: Valium) is a benzodiazepine used to treat anxiety and muscle spasms. The injection form of diazepam is used when the medication cannot be taken by mouth. Diazepam injection is also used in patients with alcohol withdrawal to prevent seizures and treat other symptoms (e.g., agitation, anxiety, hallucinations), for short-term treatment of serious seizures that do not stop (status epilepticus), or before surgeries or procedures to cause drowsiness, decrease anxiety, and cause forgetfulness about the procedure or surgery. Diazepam injection is available in generic form.

What Is Diazepam Injection?

What Are Side Effects of Diazepam Injection?

Common side effects of diazepam injection include:

Tell your doctor if you have serious side effects of diazepam injection including:

  • fainting,
  • fast or irregular heartbeat,
  • mental/mood changes (e.g., confusion, depression, strange thoughts),
  • muscle weakness,
  • vision changes (e.g., blurred/double vision),
  • slow or shallow breathing,
  • easy bleeding or bruising,
  • chest pain,
  • loss of consciousness,
  • signs of infection (e.g., fever, persistent sore throat),
  • slurred speech,
  • severe stomach or abdominal pain,
  • unusual tiredness,
  • dark urine,
  • difficulty walking, or
  • yellowing eyes or skin.

Dosage for Diazepam Injection

Dosage of Diazepam Injection depends on the condition being treated and its severity. The usual recommended dose in older children and adults ranges from 2 mg to 20 mg I.M. or I.V.

What Drugs, Substances, or Supplements Interact with Diazepam Injection?

Diazepam Injection may interact with fluvoxamine, kava, phenytoin, cimetidine, ketoconazole, omeprazole, antihistamines, anti-seizure drugs, medicine for sleep or anxiety, muscle relaxants, narcotics, or psychiatric medicines.

Diazepam Injection During Pregnancy or Breastfeeding

This medication contains a small amount of alcohol. Tell your doctor if you are taking drugs such as disulfiram or metronidazole that can adversely interact with alcohol. Diazepam Injection is not recommended for use during pregnancy. It may harm a fetus. This drug may pass into breast milk and have undesirable effects on a nursing infant. Breastfeeding while using this medication is not recommended. Diazepam Injection may cause withdrawal symptoms (shakiness, trouble sleeping, muscle cramps, vomiting, sweating, seizures, mental/mood changes such as anxiety/agitation) if you suddenly stop using this medication.

Additional Information

Our Diazepam Injection (brand name: Valium) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


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Diazepam Injection Professional Information


Side effects most commonly reported were drowsiness, fatigue, muscle weakness, and ataxia. The following have also been reported:

Central Nervous System: confusion, depression, dysarthria, headache, slurred speech, tremor, vertigo

Gastrointestinal System: constipation, nausea, gastrointestinal disturbances

Special Senses : blurred vision, diplopia, dizziness

Cardiovascular System: hypotension

Psychiatric and Paradoxical Reactions : stimulation, restlessness, acute hyperexcited states, anxiety, agitation, aggressiveness, irritability, rage, hallucinations, psychoses, delusions, increased muscle spasticity, insomnia, sleep disturbances, and nightmares. Inappropriate behavior and other adverse behavioral effects have been reported when using benzodiazepines. Should these occur, use of the drug should be discontinued. They are more likely to occur in children and in the elderly.

Urogenital System: incontinence, changes in libido, urinary retention

Skin and Appendages : skin reactions

Laboratories : elevated transaminases and alkaline phosphatase

Other: changes in salivation, including dry mouth, hypersalivation

Antegrade amnesia may occur using therapeutic dosages, the risk increasing at higher dosages. Amnestic effects may be associated with inappropriate behavior.

Minor changes in EEG patterns, usually low-voltage fast activity, have been observed in patients during and after diazepam therapy and are of no known significance.

Because of isolated reports of neutropenia and jaundice, periodic blood counts and liver function tests are advisable during long-term therapy.

Postmarketing Experience

Injury, Poisoning, And Procedural Complications

There have been reports of falls and fractures in benzodiazepine users. The risk is increased in those taking concomitant sedatives (including alcohol) and in the elderly.

Drug Abuse And Dependence

Diazepam is subject to Schedule IV control under the Controlled Substances Act of 1970. Abuse and dependence of benzodiazepines have been reported. Addiction-prone individuals (such as drug addicts or alcoholics) should be under careful surveillance when receiving diazepam or other psychotropic agents because of the predisposition of such patients to habituation and dependence. Once physical dependence to benzodiazepines has developed, termination of treatment will be accompanied by withdrawal symptoms. The risk is more pronounced in patients on long-term therapy.

Withdrawal symptoms, similar in character to those noted with barbiturates and alcohol have occurred following abrupt discontinuance of diazepam. These withdrawal symptoms may consist of tremor, abdominal and muscle cramps, vomiting, sweating, headache, muscle pain, extreme anxiety, tension, restlessness, confusion and irritability. In severe cases, the following symptoms may occur: derealization, depersonalization, hyperacusis, numbness and tingling of the extremities, hypersensitivity to light, noise and physical contact, hallucinations or epileptic seizures. The more severe withdrawal symptoms have usually been limited to those patients who had received excessive doses over an extended period of time. Generally milder withdrawal symptoms (e.g., dysphoria and insomnia) have been reported following abrupt discontinuance of benzodiazepines taken continuously at therapeutic levels for several months. Consequently, after extended therapy, abrupt discontinuation should generally be avoided and a gradual dosage tapering schedule followed.

Chronic use (even at therapeutic doses) may lead to the development of physical dependence: discontinuation of the therapy may result in withdrawal or rebound phenomena.

Rebound Anxiety

A transient syndrome whereby the symptoms that led to treatment with diazepam recur in an enhanced form. This may occur upon discontinuation of treatment. It may be accompanied by other reactions including mood changes, anxiety, and restlessness.

Since the risk of withdrawal phenomena and rebound phenomena is greater after abrupt discontinuation of treatment, it is recommended that the dosage be decreased gradually.

Read the entire FDA prescribing information for Diazepam Injection (Diazepam Injection)


Panic attacks are repeated attacks of fear that can last for several minutes. See Answer

© Diazepam Injection Patient Information is supplied by Cerner Multum, Inc. and Diazepam Injection Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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