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What are the side effects of hyoscyamine extended-release tablets?

When taking hyoscyamine extended-release tablets side effects can vary from mild to severe. Some side effects such as drowsiness are common and can affect your ability to drive. Other side effects can affect activities that require quick reactions and concentration. These side effects include:

  • blurred vision
  • dizziness
  • difficulty urinating
  • headaches
  • insomnia
  • impotence or lack of interest in sex
  • nervousness

Other common and less severe side effects include:

  • bloating
  • changes in taste
  • constipation
  • decreased sweating
  • dry mouth
  • heartburn
  • nausea and vomiting

It's important to know that drinking alcohol can increase drowsiness and dizziness. And, because hyoscyamine sulfate can reduce the amount of sweat your body produces, it's important to avoid becoming overheated and dehydrated, especially when the weather is hot or during exercise.

Severe side effects can also develop. If one or more of the following side effects develops, talk to your doctor right away. Severe side effects include:

  • confusion/hallucinations
  • diarrhea
  • irregular heartbeat (fast, pounding, uneven)
  • flushing
  • pain in the eyes
  • rash
  • unusual behavior or thoughts

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.