Isosorbide mononitrate (Ismo 40 Retard) 40 mg: Supply issue resolved

Supply issue Active

Due to an increase in demand and shipping delays because of the conflict in the Middle East, stock of Ismo 40 Retard (Pharmacode 2447355) was running low.

29 April 2026 | Update

Healthcare Logistics advises that stock has arrived and back orders have been sent out to wholesalers. It can still take another 1 to 2 weeks for stock to reach pharmacies around the country.

Where this product is not available, people will need a new prescription. They will need to talk to their prescriber about the best alternative.

Affected product

Healthcare Logistics, the supplier, advises that there was a delay to the next shipment this product because the conflict in the Middle East. Due to higher than usual demand, this delay has caused the supplier to run out of this product.

Healthcare Logistics has now run out the following product. Stock may still be available in the supply chain, at wholesalers or pharmacies. 

Chemical: Isosorbide mononitrate

  • Presentation: Tab long-acting 40 mg
  • Brand: Ismo 40 Retard
  • Pharmacode: 2447355
  • Subsidy: $9.80
  • Measure / Qty: per 30

Schedule listing for isosorbide mononitrate(external link)

Alternative option: 60 mg long-acting Duride

We have clinical advice that the 60 mg long-acting tablet, either whole or broken in two for a 30 mg dose, may be an appropriate alternative. The 60 mg Duride tablet is scored and dividable.

Half-tablet doses (30mg) can be taken without affecting the modified release properties of Duride, as long as they are not crushed or chewed. 

Medsafe datasheet for Duride 60 mg long-acting [PDF](external link)

This requires a new prescription.

  • Presentation: Tab long-acting 60 mg
  • Brand: Duride
  • Pharmacode: 2202964
  • Subsidy: $13.50
  • Measure / Qty: per 90 

Resupplied late April 2026

Healthcare Logistics released stock to wholesalers at the end of April 2026. It can take another 1 to 2 weeks to reach pharmacies around the country. 

We are continuing to monitor this product until the supplier can return to normal stock levels. 

Who to contact

If you have questions about this issue, email enquiry@pharmac.govt.nz

Please include as much information as you can about the product (presentation, brand, Pharmacode) and who your wholesaler is.

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