Ativan Side Effects

See also Warning section.

Drowsiness, dizziness, loss of coordination, headache, nausea, blurred vision, change in sexual interest/ability, constipation, heartburn, or change in appetite may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any unlikely but serious side effects, including: mental/mood changes (such as hallucinations, depression, thoughts of suicide), slurred speech or difficulty talking, vision changes, unusual weakness, trouble walking, memory problems, signs of infection (such as fever, persistent sore throat).

Get medical help right away if you have any rare but very serious side effects, including: yellowing eyes or skin, seizures, slow/shallow breathing.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
  • hemolytic anemia
  • aplastic anemia
  • anemia
  • thrombocytopenic disorder
  • agranulocytosis
  • leukopenia
  • neutropenic disorder
  • eosinophilia
  • leukocytosis
  • drug-induced psychosis
  • acute confusion
  • manic disorder
  • paranoid disorder
  • excitement
  • depersonalization
  • suicidal ideation
  • libido changes
  • drug dependence
  • nightmares
  • agitation
  • depression
  • aggressive behavior
  • hostility
  • behavioral disorders
  • diplopia
  • blurred vision
  • visual changes
  • conjunctivitis
  • nystagmus
  • hypotension
  • respiratory depression
  • sialorrhea
  • xerostomia
  • stomatitis
  • glossitis
  • dyspepsia
  • constipation
  • disease of liver
  • menstrual disorder
  • pruritus of skin
  • alopecia
  • muscle weakness
  • cramps
  • coma
  • drowsy
  • sedation
  • concentration difficulty
  • delirium
  • memory impairment
  • hallucinations
  • syncope
  • seizure disorder
  • vertigo
  • dizziness
  • sleep disorder
  • fatigue
  • tremor
  • ataxia
  • skin rash
  • anorexia
  • polydipsia
  • headache disorder
  • slurred speech
  • dysarthria
  • apnea
  • dyspnea
  • yawning
  • hiccups
  • nausea
  • diarrhea
  • dysuria
  • urinary retention
  • urinary incontinence
  • abnormal hepatic function tests
  • CNS depression
  • nervousness
  • anaphylaxis
  • angioedema
  • general weakness
  • irritability
  • accidental fall
  • jaundice
  • complex sleep behavior
  • dream disorder
  • sleep walking disorder
  • disturbance in thinking
  • tachycardia

Drug Interactions

See also Warning section.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug include: clozapine, kava, sodium oxybate (also known as gamma hydroxybutyrate or GHB).

The risk of serious side effects (such as slow/shallow breathing, severe drowsiness/dizziness) may be increased if this medication is taken with other products that may also cause drowsiness or breathing problems. Tell your doctor or pharmacist if you are taking other products such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana (cannabis), other drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), or antihistamines (such as cetirizine, diphenhydramine).

Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.