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Side Effects of Fentanyl Sublingual Tablets

Common side effects of fentanyl sublingual tablets include headaches, nausea, and constipation. While these problems generally require little or no treatment, potentially serious reactions are possible while taking this medication. If you experience more serious side effects, such as difficulty breathing, severe constipation, or hallucinations, notify your healthcare provider right away. Other, less common side effects can include heartburn, weakness, and blurred vision.

An Introduction to Side Effects of Fentanyl Sublingual Tablets

Just like any medicine, fentanyl sublingual tablets (Abstral®) can cause side effects. However, not everyone who uses the medication will have problems. 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 treated easily by you or your healthcare provider.
 
(This article covers many, but not all, of the possible fentanyl sublingual tablets side effects. Your healthcare provider can discuss a more complete list with you.)
 

Serious Fentanyl Sublingual Tablet Side Effects

Some side effects of fentanyl sublingual tablets are potentially serious and should be reported immediately to your healthcare provider. These include but are not limited to:
 
  • The urge to take more tablets than prescribed or for a nonmedical purpose (see Abstral Abuse)
  • Any difficulty breathing, including reduced, shallow, slow, or irregular breathing
  • Cold and clammy skin
  • A slow heart rate (bradycardia)
  • Extreme drowsiness, especially when accompanied by slow breathing
  • Feeling faint, extremely dizzy, or confused
  • Severe constipation
  • Unusual changes in behavior or mood (including depression, hostility, agitation, paranoia, or anxiety)
  • Hallucinations (seeing or hearing things that are not really there)
  • Pain, irritation, or sores in the mouth
  • Signs of an allergic reaction, such as:
 
    • An unexplained rash
    • Hives
    • Itching
    • Swelling of the mouth or throat
    • Wheezing
    • Difficulty breathing.
 
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Fentanyl Sublingual Tablet Information

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