This CredibleMeds Mobile App supports the website which maintains and posts lists of drugs in categories that reflect their ability to prolong the QT interval on the electrocardiogram and/or cause the life-threatening heart arrhythmia, torsades de pointes (TdP).

The CredibleMeds Mobile App was developed for patients with Congenital Long QT Syndrome, healthcare professionals and research scientists in order to provide them with ready access to the most up-to-date version of the CredibleMeds lists of drugs.

The App also provides background information on the categories of drug risk and explains the relationship between QT prolongation and TdP.

For healthcare professionals and research scientists, the QTdrugs Lists can be used to identify which drugs can cause QT prolongation or TdP.

For patients with Congenital Long QT Syndrome, the drugs and risk categories are described and presented separately as the Drugs to Avoid in cLQTS.

What’s New

Version 3.5.2

German Translations.
More optimisations under the hood.

Ratings and Reviews

4.5 out of 5
11 Ratings

11 Ratings

JSTravels ,

Thank you!

I just made a donation to Azcert because this app has been so helpful to me. I have relatives with LQT and I don’t know where we would be without your published information. We have corrected several errors that doctors have made in prescribing medicines, even when the LQT is on the med charts. Thank you for all you do!

matteo1090 ,

Best app

This app is honestly the best thing I never realized how much I actually need it and there’s so many new drugs coming up and it’s great to have an app to find what drugs you shouldn’t take

Angelbaby062 ,

Love it, but...

I love this app. It has been so helpful in preventing me from taking a medication that could adversely effect me. However, it needs to be updated more frequently. And ability to search by name brand rather than active ingredients. There are still several medicines that do not show up when searched for. But, other than that, wonderful tool!


17.4 MB

Requires iOS 10.3 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Frequent/Intense Medical/Treatment Information


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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