# SafeLocal — For safe dosing calculations

> Medical app for calculating safe local anesthetic dosages with patient-specific factors. (iPhone/iPad app by Johns Hopkins Mobile medicine.)

- Source: https://appshunter.io/ios/app/safelocal/id1440999841 (this page in markdown: same URL + `.md`)
- Developer: [Johns Hopkins Mobile medicine](https://appshunter.io/developer/488749253)
- Category: Medical, Reference
- Price: Free
- Rating: 3.70/5 from 46 App Store ratings · 20 written reviews indexed
- Age rating: 17+
- Requires: iOS 13.5 · 1 MB
- Languages: American English
- Released: 2018-12-13
- Data updated: 2026-08-15
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/safelocal/id1440999841/reviews.md

## What is SafeLocal?

SafeLocal is an application developed by Johns Hopkins that makes calculating safe dosages of local anesthetic quick and easy for anesthesiologists, surgeons, and other medical providers. It seamlessly incorporates patient weight, disease processes, mixtures of local anesthetic, and presence or absence of additives, to calculate the maximum safe dose of local anesthetic without the hassle of going through the calculations by hand, all while tracking how much of the maximum safe dose has been used up and how much is left over for safe administration.

FEATURES:
●	Dosage calculator for local anesthetics, including complex mixtures and non-standard concentrations.
●	Adjusts maximum safe dose by patient weight (lbs or kg).
●	Choice between anesthesia with or without epinephrine.
●	Option to add comorbidities such as extremes of age, severe renal dysfunction, hepatic dysfunction, or advanced heart failure, with automatic adjustment of maximum safe dose.
●	Ability to calculate remaining safe dose of anesthesia for anesthesiologist or surgeon to administer based on how much has already been administered.

Calculations based on Chapter 36 (Local Anesthesia) of Miller’s Anesthesia, 8th Edition. Adjustment for comorbidities based on the 2004 publication “Maximum Recommended Doses of Local Anesthetics: A Multifactorial Concept” by Rosenberg et al.

The information provided by the application is based on expert opinion. It is to be used as a recommendation only. Clinical judgment by a physician is required in every situation. The user assumes all responsibility for decisions made with the information provided by this app.

Project produced at the Johns Hopkins University School of Medicine by Jonathan D. Lin, M.D. and Jean-Pierre P. Ouanes, D.O. Funded generously by the Johns Hopkins Bayview Patient Safety Pyramid Grant Program.

Adapted from the 2017 version of the American Society of Regional Anesthesia and Pain Medicine Checklist for Managing Local Anesthetic Systemic Toxicity. Source: Neal JM, Woodward CM, Harrison TK. The American Society of Regional Anesthesia and Pain Medicine Checklist for Managing Local Anesthetic Systemic Toxicity: 2017 Version. Reg Anesth Pain Med. 2018 Feb;43(2):150-153.

## Key features

- Dosage calculator for local anesthetics
- Adjusts dose by patient weight
- Includes anesthesia with or without epinephrine
- Accounts for comorbidities
- Calculates remaining safe dose

## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/safelocal/id1440999841/reviews.md

### 2/5 — No naropin in left over

*2026-03-20, version 1.05*

There’s no naropin on the final left over medication list… also doesn’t tell you when you’re overdosing medications. No updates on this app for over 5 years…

### 1/5 — I don’t trust this app

*2025-09-25, version 1.05*

I should make an app myself. This is very inaccurate.

### 3/5 — Incomplete

*2025-09-18, version 1.05*

Locals should be additive. Beware overdosing. Also, needs more local anesthetic concentrations. There’s no lidocaine 2%. Also the app only calculates the leftover bupibicaine for the surgeon as 0.25 %.  Half percent isn’t calculated.

### 2/5 — Has potential

*2025-01-20, version 1.05*

This could be so useful if they changed a few things around. Add in the hard stops and correct additive formulas

### 3/5 — Dental anesthesia

*2024-11-08, version 1.05*

As a dentist I would like to see articaine and prilocaine reviewed also.

### 4/5 — Add 0.5% bupivacaine

*2024-07-11, version 1.05*

Need to add 0.5% for surgeons preference at end. Only lists 0.25%, so I’ve been halving the remaining total listed.

### 1/5 — Needs to be fixed

*2023-11-25, version 1.05*

This is a great and much needed app. However, it has one major flaw: the lb vs kg screen. It should just use one of them for everybody. 

Because of that screen, which I thought I had set to lbs, I overdosed a patient. Thankfully nothing bad happened. 

I cannot in good conscience give more than one star to the app, as ling as that screen is not fixed. Local anesthetic systemic toxicity is a killer.

Many thanks to both authors. Your work is highly appreciated.

### 2/5 — Would be 5/5 but

*2023-04-12, version 1.05*

The app doesn’t take into account the hard stop maximums for dosing. Ex: bupivacaine not to exceed 175 mg no matter their weight, or any other local anesthetic, the app does not inform you if you are given a volume over safe dosing limits. Since the whole purpose of the app is to inform you of appropriate safe dosing limits, this really should be addressed or have a notification when above hard stop dosages.

### 2/5 — Incorrect Mixed Dose Calculations

*2022-10-21, version 1.05*

The app is great in theory, but when you are mixing locals the max should be additive, which is not the way it shows up when you select 2 different locals. For example, in a 70kg pt your max of 0.5% bupiv is 35cc, and with 1% Lido your max is also 35cc, but when using both, your MAX is still 35cc. The app gives the impression that you can give 70cc when using this combo (stating 35cc each), which is not correct.

### 1/5 — Update to support dark mode

*2020-06-25, version 1.04*

Please support dark mode in iOS. When the phone is in dark mode, all the clickable text and entered text appears white on a white background (I.e invisible).

## Frequently asked questions about SafeLocal

### What does the SafeLocal app do?

SafeLocal is a medical application designed to quickly and easily calculate safe dosages of local anesthetic. It takes into account various patient-specific factors such as weight, existing disease processes, mixtures of anesthetics, and the presence of additives to determine the maximum safe dose.

### What are the key features of SafeLocal?

Key features include a dosage calculator for local anesthetics, including complex mixtures and non-standard concentrations. It adjusts the maximum safe dose based on patient weight (lbs or kg), allows a choice between anesthesia with or without epinephrine, and can incorporate comorbidities like severe renal or hepatic dysfunction, automatically adjusting the maximum safe dose.

### Is SafeLocal free to use?

Yes, the application is provided free of charge. There are no in-app purchases or advertisements mentioned, indicating it is a completely free tool for medical professionals.

### Who is the target audience for SafeLocal?

This application is intended for anesthesiologists, surgeons, and other medical providers who are responsible for calculating and administering local anesthetic dosages. It aims to streamline this process and enhance patient safety.

### What medical information is SafeLocal based on?

The calculations within SafeLocal are based on Chapter 36 (Local Anesthesia) of Miller’s Anesthesia, 8th Edition. Adjustments for comorbidities are based on the 2004 publication “Maximum Recommended Doses of Local Anesthetics: A Multifactorial Concept” by Rosenberg et al. The app also references the American Society of Regional Anesthesia and Pain Medicine Checklist for Managing Local Anesthetic Systemic Toxicity.

## Version history (last 5 releases)

### 1.05 — 2020-07-07

Bug fixes

### 1.04 — 2020-01-24

-Bug fixes

### 1.03 — 2019-06-19

-Addition of the following functionality to the SafeLocal mobile app: incorporation of pregnancy as a comorbidity associated with a 15% reduction of local anesthetic dosing.
-Inclusion of a checklist for local anesthetic systemic toxicity.

### 1.02 — 2018-12-14

Bug fixes

### 1.0 — 2018-12-12

No release notes.

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*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 2026-08-15.*