Dosing for ISM

AYVAKYT – one tablet, 25 mg once-daily dosing1

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Managing your patients taking AYVAKYT1

The recommended starting dose for patients with ISM is 25 mg once daily

AYVAKYT should be taken as follows:1

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One tablet orally

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One time each day

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On an empty stomach, at least 1 hour before or 2 hours after a meal

  • The recommended starting dose for patients with ISM is 25 mg once daily
  • Patients with ISM must not exceed the recommended starting dose of 25 mg once daily
  • Treatment should continue until disease progression or unacceptable toxicity occurs
  • Concomitant use of AYVAKYT with strong or moderate CYP3A inhibitors should be avoided

Additional instructions:

  • AYVAKYT tablets should be swallowed whole with a glass of water
  • Do not take an extra dose if vomiting occurs after taking a dose
  • Do not make up for the missed dose within 8 hours of the next scheduled dose

Interruption of treatment with or without dose reduction may be considered to manage adverse reactions based on severity and clinical presentation1

The dose should be adjusted based on safety and tolerability1

In 141 patients who received AYVAKYT at recommended dose of 25 mg in Part 2 the PIONEER study, no intracranial haemorrhages were reported. Cognitive effects occurred in 2.8% of patients – all Grade 1 or 2; no patients permanently discontinued treatment due to cognitive effects1

Please refer to the Recommended dose modifications for patients experiencing adverse reactions1

Recommended dose reductions from the 25 mg once-daily starting dose1

Dose reduction Starting dose (25 mg)
First 25 mg once every other day
Second Discontinue

A modified starting dose is recommended for patients with severe hepatic impairment: 25 mg orally every other day. Patients requiring dose reduction below 25 mg once every other day must discontinue treatment

Dose modifications in clinical trials1

PIONEER

Patients with ISM treated with 25 mg AYVAKYT (n=141):

<1%

Treatment discontinuation due to adverse reactions

This medicinal product is subject to additional monitoring. This will allow quick identification of new safety information. Healthcare professionals are asked to report any suspected adverse reactions. See section 4.8 of the product SmPC for how to report adverse reactions.

References

  1. AYVAKYT® (avapritinib). Summary of Product Characteristics. Available at: https://www.ema.europa.eu/en/documents/product-information/ayvakyt-epar-product-information_en.pdf. Accessed February 2024.
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