Sleep Home > Side Effects of Triazolam

Headaches, dizziness, and drowsiness are among the most common problems seen with triazolam. Side effects are typically minor and, in many cases, are easily treated by you or your healthcare provider. However, if you develop any serious side effects, such as suicidal thoughts, hallucinations, or signs of an allergic reaction, be sure to contact your healthcare provider.

An Introduction to Side Effects of Triazolam

As with any medicine, side effects are possible with triazolam (Halcion®). However, not everyone who takes the medication will experience side effects. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider.
(This article covers many, but not all, of the possible triazolam side effects. Your healthcare provider can discuss a more complete list with you.)

Common Triazolam Side Effects

Triazolam has been studied thoroughly in clinical trials in which the side effects of a group of people taking the drug are documented and then compared to another group not taking the medicine. As a result, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
In these studies, the most common side effects of triazolam included:
  • Drowsiness -- in up to 14 percent of people
  • Headaches -- up to 9.7 percent
  • Dizziness -- up to 7.8 percent
  • Nervousness -- up to 5.2 percent
  • Lightheadedness -- up to 4.9 percent
  • Coordination problems -- up to 4.6 percent
  • Nausea or vomiting -- up to 4.6 percent.
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Last reviewed by: Kristi Monson, PharmD;
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