Evidence from medication-safety and drug-information resources indicates that isosorbide dinitrate should not be crushed when administered as a sublingual or extended-/modified-release formulation. Sublingual tablets are designed to dissolve under the tongue for proper mucosal absorption and should not be crushed, chewed, or swallowed. Extended- or modified-release formulations must be swallowed whole to prevent rapid, uncontrolled drug release and adverse effects. In addition, guidance from ...
According to the 2015 Handbook of Drug Administration via Enteral Feeding Tubes, guidance for isosorbide dinitrate indicates that crushing certain tablet formulations is not recommended. Specifically, for isosorbide dinitrate tablets (Actavis), the recommendation against crushing is based on personal communication with the manufacturer, and the use of an alternative route of administration is advised. Modified-release formulations (e.g., Isoket Retard) are described as unsuitable for administration via enteral feeding tubes, despite the ability to halve the tablets. Overall, the Handbook notes that crushing certain isosorbide dinitrate tablet formulations is not recommended and highlights alternative formulations or routes when appropriate. [1]
According to the Mayo Clinic, sublingual isosorbide dinitrate tablets should not be chewed, crushed, or swallowed because they are intended to dissolve under the tongue and be absorbed through the lining of the mouth. Additionally, extende...
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A search of the published medical literature revealed
0 studies investigating the researchable question:
Can isosorbide dinitrate be crushed?
Level of evidence
D - Case reports or unreliable data
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[1] White R, Bradnam V. Handbook of Drug Administration via Enteral Feeding Tubes. 3rd ed. London, UK: Pharmaceutical Press; 2015.
[2] Mayo Clinic. Isosorbide dinitrate (oral route, sublingual route). Mayo Clinic Drugs and Supplements. Updated September 1, 2025. Accessed January 4, 2026.
[3] Makati Medical Center, Department of Pharmacy Services, Pharmacy Information, Training and Development. Oral dosage forms that should not be crushed. Revision 31. December 16, 2025. Accessed January 5, 2026.
[4] How and when to take isosorbide mononitrate and isosorbide dinitrate. National Health Ser...