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Halcion Patient Information Including Side Effects

Brand Names: Halcion

Generic Name: triazolam (Pronunciation: trye AY zoe lam)

What is triazolam (Halcion)?

Triazolam is in a group of drugs called benzodiazepines (ben-zoe-dye-AZE-eh-peens). Triazolam affects chemicals in the brain that may become unbalanced and cause sleep problems (insomnia).

Triazolam is used to treat insomnia symptoms, such as trouble falling or staying asleep.

Triazolam may also be used for other purposes not listed in this medication guide.

Triazolam 0.125 mg-GRE

oval, white, imprinted with G 3717

Triazolam 0.125 mg-PAR

oblong, white, imprinted with G, TR 125

Triazolam 0.125 mg-ROX

oval, white, imprinted with 54 519

Triazolam 0.25 mg-GRE

oval, blue, imprinted with G 3718

Triazolam 0.25 mg-ROX

oval, blue, imprinted with 54 620

What are the possible side effects of triazolam (Halcion)?

Stop using triazolam and call your doctor at once if you have any of these serious side effects:

  • weak or shallow breathing;
  • fast or pounding heartbeats;
  • confusion, slurred speech, unusual thoughts or behavior;
  • hallucinations, agitation, aggression;
  • thoughts of suicide or hurting yourself;
  • restless muscle movements in your eyes, tongue, jaw, or neck;
  • pale skin, easy bruising or bleeding, unusual weakness;
  • fever, chills, body aches, flu symptoms;
  • problems with urination; or
  • nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Less serious side effects may include:

  • daytime drowsiness (or during hours when you are not normally sleeping);
  • amnesia or forgetfulness;
  • muscle weakness, lack of balance or coordination;
  • numbness, burning, pain, or tingly feeling;
  • headache, blurred vision, depressed mood;
  • feeling nervous, excited, or irritable;
  • nausea, vomiting, stomach discomfort; or
  • dry mouth, increased thirst.

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.

Read the Halcion (triazolam) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about triazolam (Halcion)?

Some people using this medicine have engaged in activity such as driving, eating, or making phone calls and later having no memory of the activity. If this happens to you, stop taking triazolam and talk with your doctor about another treatment for your sleep disorder.

Do not use this medication if you are allergic to triazolam or to other benzodiazepines, such as alprazolam (Xanax), chlordiazepoxide (Librium), clorazepate (Tranxene), diazepam (Valium), or lorazepam (Ativan).

Before taking triazolam, tell your doctor if you have any breathing problems, glaucoma, kidney or liver disease, myasthenia gravis, or a history of depression, suicidal thoughts, or addiction to drugs or alcohol.

Do not drink alcohol while taking triazolam. It can increase some of the side effects, and could possibly cause a fatal overdose.

Avoid using other medicines that make you sleepy. They can add to sleepiness caused by triazolam.

Triazolam may be habit-forming and should be used only by the person it was prescribed for. Triazolam should never be given to another person, especially someone who has a history of drug abuse or addiction. Keep the medication in a secure place where others cannot get to it.

Side Effects Centers

Halcion - User Reviews

Halcion User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Halcion sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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