Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/29/2025

Morphin Therapy in Open-Angle Glaucoma

Introduction to Morphin Therapy

  • The American College of Physicians recommends that morphin can be used in patients with open-angle glaucoma, as it does not have negative effects on intraocular pressure and may even lower it in some cases 1

Administration and Dosage

  • The British Journal of Cancer suggests that oral administration is the preferred route for morphin 2
  • The dosage should be individually titrated, starting with the lowest effective dose, as recommended by the British Journal of Cancer 3

Monitoring and Precautions

  • Regular monitoring of intraocular pressure during morphin therapy is recommended, according to the American College of Physicians 1
  • Patients with advanced glaucoma should have their pain therapy carefully titrated, as advised by the American College of Physicians 1
  • Attention should be paid to side effects such as constipation, nausea, and drowsiness, as noted by the British Journal of Cancer 2

Alternative Pain Therapies

  • The American Academy of Family Physicians suggests that paracetamol can be used as a first-line treatment for mild to moderate pain 4
  • Non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or diclofenac can be used as alternatives if there are no contraindications, as recommended by the American College of Physicians 1

Important Precautions

  • In long-term morphin therapy, intraocular pressure should be regularly monitored, as advised by the American College of Physicians 1
  • Constipation should always be anticipated and treated in patients taking morphin, according to the British Journal of Cancer 3
  • Opioid treatment should never be abruptly discontinued, as noted by the British Journal of Cancer 3