# IMPACT > Medical reference for appropriate antimicrobial drug use and combating resistance. (iPhone/iPad app by Infection Control Branch, Centre for Health Protection, Department Of Health, HKSAR.) - Source: https://appshunter.io/ios/app/impact/id592326130 (this page in markdown: same URL + `.md`) - Developer: [Infection Control Branch, Centre for Health Protection, Department Of Health, HKSAR](https://appshunter.io/developer/592326133) - Category: Medical, Reference - Price: Free - Age rating: 4+ - Requires: iOS 13.0 · 114 MB - Languages: English - Released: 2013-01-16 - Data updated: 2026-06-25 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/impact/id592326130/reviews.md ## What is IMPACT? The IMPACT Guideline serves as an invaluable reference tool for medical and health professionals in reinforcing the appropriate use of antimicrobial drugs. Antimicrobial resistance has reached alarming levels. IMPACT Guideline recognises the dangers of antimicrobial resistance, the tremendous adverse effect it has on quality medical care, and the need for a strong, coordinated and multifaceted response. The IMPACT Guideline combines the latest scientific evidence on the usage of antimicrobial agents, empirical therapy of common infections, treatment of infections with known pathogens and surgical prophylaxis with data on the prevalence and sensitivity patterns of different pathogens in Hong Kong. It also contains practical tips on the safe use of antibiotics in inpatient settings, management of penicillin allergy and application of diagnostic tests on clinical microbiology. Disclaimer: The IMPACT Guideline app is intended for medical professionals as a reference only and is not intended to be prescriptive or a substitute for clinical judgment in the management of individual patients. It is not a complete or authoritative diagnostic or treatment guide. Medical professionals are encouraged to obtain relevant information from other sources, including the latest drug alerts, and exercise their clinical judgment. ## Key features - Antimicrobial drug usage guidelines - Empirical therapy for infections - Treatment of infections with known pathogens - Surgical prophylaxis data - Pathogen prevalence and sensitivity patterns - Safe antibiotic use tips - Penicillin allergy management ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/impact/id592326130/reviews.md ### 4/5 — Massive bug if using dark mode *2021-01-20, version 5.3* Can't see a single word if using dark mode but works fine if in light mode. Please change this ASAP. ### 5/5 — A very detailed App *2014-01-28, version 2.6* Nice ### 3/5 — Not so useful as expected *2013-10-07, version 2.2* Not user friendly compared with the paper version. And there's no additional factors compared with the paper one. The only advantage of it over the paper is that it updates more frequently. ### 4/5 — Good App *2013-03-08, version 1.3* Useful , design is quite nice too! ### 5/5 — Very good! *2013-02-11, version 1.1* Can make one for internal medicine handbook ma? ### 1/5 — IMPACT *2013-02-09, version 1.1* Doesn't work! ## Frequently asked questions about IMPACT ### What is IMPACT? IMPACT is a medical reference app designed for health professionals to reinforce the appropriate use of antimicrobial drugs and combat antimicrobial resistance. ### Is IMPACT free to use? Yes, IMPACT is available for free on the App Store. ### What devices does IMPACT support? IMPACT is supported on iPhone, iPad, and iPod devices. ### How often is IMPACT updated? The latest version, 6.0.3, was last updated on June 11, 2026, indicating a history of updates. ### What kind of information does IMPACT provide? IMPACT offers scientific evidence on antimicrobial agents, empirical therapy, treatment of known pathogens, surgical prophylaxis, and local pathogen data. ### Is IMPACT suitable for patients? No, IMPACT is intended for medical professionals as a reference tool and is not a substitute for clinical judgment or a diagnostic guide for patients. ### Does IMPACT include information on drug resistance? Yes, IMPACT specifically addresses the dangers of antimicrobial resistance and provides guidance to help mitigate it. ### What is the age rating for IMPACT? IMPACT has an age rating of 4+, making it suitable for a wide range of users. ## Version history (last 5 releases) ### 6.0.3 — 2026-06-11 Updated antibiogram - Private Hospital Table HKAH-SR. 2025. Enhanced accessibility. ### 6.0.2 — 2025-10-06 The IMPACT guideline has been uploaded. The latest version is available in PDF format at impact.chp.gov.hk. The user interface of the app has been updated to provide better user experience. ### 6.0.1 — 2025-09-30 The IMPACT guideline has been uploaded. The latest version is available in PDF format at impact.chp.gov.hk. The user interface of the app has been updated to provide better user experience. ### 6.0.0 — 2025-09-29 The IMPACT guideline has been uploaded. The latest version is available in PDF format at impact.chp.gov.hk. The user interface of the app has been updated to provide better user experience. ### 5.21 — 2025-05-21 The IMPACT guildline has been uploaded. The latest version is available in PDF format at impact.chp.gov.hk. Our mobile application update is currently in progress. Please refer to the website for the most current guidelines until the app update is complete by 2025. ## Apps similar to IMPACT | App | Rating | Price | Category | | --- | --- | --- | --- | | [衞生署DH](https://appshunter.io/ios/app/dh/id6468657794) | — | Free | Medical | | [造口護理通](https://appshunter.io/ios/app/id1123510120) | — | Free | Medical | | [PharmCare](https://appshunter.io/ios/app/pharmcare/id1663110134) | — | Free | Medical | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*