Interaction Checker

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Website updates – July and August 2026

Monday 31 August 2026

The past two months have seen the addition of 19 new comedications to the interaction checker and the removal of one (artemisinin). The new comedications are listed below.

  • Aficamten (Hypertension / Heart Failure Agents)
  • Arformoterol (Bronchodilators)
  • Artemether (Antiprotozoals)
  • Artesunate (Antiprotozoals)
  • Calcifediol (Calcidiol) (Herbals/Supplements/Vitamins)
  • Calcitriol (Other)
  • Elinzanetant (Other)
  • Eluxadoline (Gastrointestinal Agents)
  • Gepotidacin (Antibacterials)
  • Ibrexafungerp (Antifungals)
  • Lofexidine (Other)
  • Mavacamten (Hypertension / Heart Failure Agents)
  • Milsaperidone (Antipsychotics/Neuroleptics)
  • Naloxegol (Gastrointestinal Agents)
  • Pimavanserin (Antipsychotics/Neuroleptics)
  • Samidorphan (Other)
  • Suvorexant (Anxiolytics/Hypnotics/ Sedatives)
  • Vorapaxar (Anti-coagulant, Anti-platelet and Fibrinolytic)
  • Zavegepant (Antimigraine Agents)


A few interaction colour changes have also been made in response to updated information and/or for consistency.

  • Benzonatate now has a conditional risk of TdP on the Credible Medicines website and interactions with efavirenz, fostemsavir and rilpivirine (and rilpivirine-containing combinations) have been changed from green to yellow. A comment about the updated risk status has been added to interactions for atazanavir (alone and with ritonavir or cobicistat) and lopinavir, but no colour change was required.
  • The interaction between ursodeoxycholic acid and lenacapavir has been changed from red to amber for consistency with some of the other ARVs.
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