Therapeutic Index Calculator

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✖The Median Lethal Dose which represents the dose at which 50% of the population exhibits toxic effects or dies.ⓘ Median Lethal Dose [LD50]			+10% -10%
✖The Median Effective Dose represents the dose at which 50% of the population exhibits the desired therapeutic effect.ⓘ Median Effective Dose [ED50]			+10% -10%

✖The Therapeutic Index measure that reflects the safety of a drug by comparing its therapeutic dose (effective dose) to its toxic dose.ⓘ Therapeutic Index [TI]

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Formula

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Therapeutic Index

Formula

`"TI" = "LD50"/"ED50"`

Example

`"7.5"="150mg"/"20mg"`

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Therapeutic Index Solution

STEP 0: Pre-Calculation Summary

Formula Used

Therapeutic Index = Median Lethal Dose/Median Effective Dose
TI = LD50/ED50
This formula uses 3 Variables

Variables Used

Therapeutic Index - The Therapeutic Index measure that reflects the safety of a drug by comparing its therapeutic dose (effective dose) to its toxic dose.
Median Lethal Dose - (Measured in Kilogram) - The Median Lethal Dose which represents the dose at which 50% of the population exhibits toxic effects or dies.
Median Effective Dose - (Measured in Kilogram) - The Median Effective Dose represents the dose at which 50% of the population exhibits the desired therapeutic effect.

STEP 1: Convert Input(s) to Base Unit

Median Lethal Dose: 150 Milligram --> 0.00015 Kilogram (Check conversion here)
Median Effective Dose: 20 Milligram --> 2E-05 Kilogram (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

TI = LD50/ED50 --> 0.00015/2E-05

Evaluating ... ...

TI = 7.5

STEP 3: Convert Result to Output's Unit

7.5 --> No Conversion Required

FINAL ANSWER

7.5 <-- Therapeutic Index

(Calculation completed in 00.020 seconds)

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Credits

Created by Ritacheta Sen

University of Calcutta (C.U), Kolkata

Ritacheta Sen has created this Calculator and 25+ more calculators!

Verified by Soupayan banerjee

National University of Judicial Science (NUJS), Kolkata

Soupayan banerjee has verified this Calculator and 500+ more calculators!

< 21 Drug Content Calculators

Saponification value

Go Saponification Value = Molecular weight of KOH*(Volume of blank-Volume of Actual solution)*Normality of solution/Weight of sample taken

Fraction of Drug Unbound in Tissue given Apparent Tissue Volume

Go Fraction Unbound in Tissue = (Fraction Unbound in Plasma*Apparent Tissue Volume)/(Volume of Distribution-Plasma Volume)

Secretion Rate of Drug

Go Secretion Rate of Drug = (Renal Clearance*Plasma Concentration)-(Filtration Rate)+(Reabsorption Rate of Drug)

Reabsorption Rate of Drug

Go Reabsorption Rate of Drug = ((Renal Clearance*Plasma Concentration)+Filtration Rate+Secretion Rate of Drug)

Filtration Rate of Drug

Go Filtration Rate = ((Renal Clearance*Plasma Concentration)+Reabsorption Rate of Drug-Secretion Rate of Drug)

Relative Bioavailability of Drug

Go Relative Bioavailability = (Area under curve Dosage A/Area under curve Dosage B)*(Dose Type B/Dose Type A)

Acid Value of KOH

Go Acid Value = Molecular weight of KOH*Volume of solution koh*Normality of solution/Weight of sample taken

Drug Purity given Rate of Administration and Dosing Interval

Go Drug Purity = (Drug Rate of Administration*Dosing Interval)/(Administered Dose*Bioavailability)

Rate of Administration of Drug given Dosing Interval

Go Drug Rate of Administration = (Administered Dose*Bioavailability*Drug Purity)/Dosing Interval

Drug Purity given Administrative Dose and Effective Dose

Go Drug Purity = Effective Dose/(Administered Dose*Bioavailability)

Drug Loading Efficiency

Go Drug Loading Efficiency = Weight of drug in nanoparticles/Weight of the Nanoparticles*100

Encapsulation Efficiency

Go Encapsulation Efficiency = Weight of drug in nanoparticles/Weight of feeding drug*100

Renal Clearance of Drug

Go Renal Clearance = Drug Amount Excreted Unchanged in Urine/Area Under Curve

Concentration of Drug given Rate of Infusion of Drug

Go Concentration of Drug = Rate of Infusion/Volume of Plasma Cleared

Rate of Infusion of Drug

Go Rate of Infusion = Volume of Plasma Cleared*Concentration of Drug

Therapeutic Index

Go Therapeutic Index = Median Lethal Dose/Median Effective Dose

Absorption Half-Life of Drug

Go Absorption Half Life = ln(2)/Absorption Rate Constant

Drug Rate Entering Body

Go Absorption Rate Constant = ln(2)/Absorption Half Life

Apparent Volume of Drug Distribution

Go Volume of Distribution = Dose/Concentration of Drug

Tablet Dosage

Go Number of tablet = Desired dosage/Stock strength

Easter Value

Go Easter Value = Saponification Value-Acid Value

Therapeutic Index Formula

Therapeutic Index = Median Lethal Dose/Median Effective Dose
TI = LD50/ED50

What is the range of LD50 and ED50?

The Therapeutic Index formula is defined as a measure that reflects the safety of a drug by comparing its therapeutic dose (effective dose) to its toxic dose. The therapeutic index provides information about the separation between the dose that produces the desired therapeutic effect and the dose that produces toxic effects.
LD50 is the Median Lethal Dose, which represents the dose at which 50% of the population exhibits toxic effects or dies.
ED50 is the Median Effective Dose, which represents the dose at which 50% of the population exhibits the desired therapeutic effect.

How to Calculate Therapeutic Index?

Therapeutic Index calculator uses Therapeutic Index = Median Lethal Dose/Median Effective Dose to calculate the Therapeutic Index, Therapeutic Index is defined as the ratio of the dose that produces toxicity to the dose that produces a clinically desired or effective response. Therapeutic Index is denoted by TI symbol.

How to calculate Therapeutic Index using this online calculator? To use this online calculator for Therapeutic Index, enter Median Lethal Dose (LD50) & Median Effective Dose (ED50) and hit the calculate button. Here is how the Therapeutic Index calculation can be explained with given input values -> 7.5 = 0.00015/2E-05.

FAQ

What is Therapeutic Index?

Therapeutic Index is defined as the ratio of the dose that produces toxicity to the dose that produces a clinically desired or effective response and is represented as TI = LD50/ED50 or Therapeutic Index = Median Lethal Dose/Median Effective Dose. The Median Lethal Dose which represents the dose at which 50% of the population exhibits toxic effects or dies & The Median Effective Dose represents the dose at which 50% of the population exhibits the desired therapeutic effect.

How to calculate Therapeutic Index?

Therapeutic Index is defined as the ratio of the dose that produces toxicity to the dose that produces a clinically desired or effective response is calculated using Therapeutic Index = Median Lethal Dose/Median Effective Dose. To calculate Therapeutic Index, you need Median Lethal Dose (LD50) & Median Effective Dose (ED50). With our tool, you need to enter the respective value for Median Lethal Dose & Median Effective Dose and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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