What Is The Difference Between Bioavailability And Bioequivalence Studies?

Difference Between Bioavailability And Bioequivalence Studies

If you want to know the difference between bioavailability and bioequivalence studies, then your answer is here, and it’s designed for you in simple words. Certainly, Biolavaible means the drug or other material is actively fast and completely absorbed in the body. The difference between bioavailability and bioequivalence studies is how the team compares two similar products. That’s all. Here is your answer, but you can check out the blog for more details.

Elaborate Difference Between Bioavailability and Bioequivalence Studies

Here is the table contains proper information on the Difference between Bioavailability and Bioequivalence:-

S.NoAspectBioavailability StudiesBioequivalence Studies
1DefinitionRate and extent of substance retention and movement in the body.Comparison between two comparable items’ Bioavailability.
2ObjectiveSurvey medicine concentration in the circulatory system.Check which item is more bioavailable.
3FocusSubstance absorption and action inside the bodyComparison of Bioavailability between comparable items.
4FDA UseImportant for pharmaceutical approval, guaranteeing well-being and adequacy.Critical for administrative endorsement, establishing equality.
5LimitNot Applicable80% to 125%

What Is Bioavailability? 

Bioavailability simply means the drug or any kind of substance that enters our body with transmission or through any process is referred to as bioavailable. This thing will be active in our body because it is absorbed. 

What Are The 2 Types Of Bioavailability?

There are two types of Bioavailability: Absolute Bioavailability and Relative Bioavailability. Absolute Bioavailability is a material that can easily be mixed in your bloodstream directly with an intravenous means. Relative Bioavailability is the quantity of the material that gets into our bloodstream via some other method of management.

What Is Bioavailability And Bioequivalence In Pharmaceutical Technology?

The main objective of the bioavailability study is to evaluate the blood serum concentration (in ng/mcg level) of a specific medication with the assistance of sophisticated instruments, including HPLC. Bioavailability and Bioequivalence in pharmaceutical technology are explained in this answer. Also, check the 

What Is A Bioequivalence Study?

The Bioequivalence study refers to the study of two drugs or two types of materials of the same medicine comparison. This helps to show which drug is the bioavailable one. In the next answer, you can also check the bioequivalence study types; on the above, you can see the difference between Bioavailability and Bioequivalence. These kinds of studies mainly happen due to checking the generic drugs and their formation if the medicine is changed during its development.

How is Bioavailability Connected With the FDA?

Bioavailability refers to the rate and extent to which an active pharmaceutical is absorbed and opens up at the site of operation. The Registration of FDA utilizes bioavailability studies to decide the suitability and well-being of medications. These studies are vital for drug endorsement, particularly for guaranteeing conventional medications are branded to their counterpart about performance, strength, and dosage.

How To Calculate Bioavailability?

This is the formula you can use to calculate Bioavailability.

Bioavailability Calculation Formula

This formula would help in counting the pharmaceuticals present in your bloodstream if you took the drug orally compared to injection one. 

What Is The Objective Of the Bioequivalence Study?

The objective of the Bioequivalence study is necessary and it is used for the growth of drug preparation in the industry of the pharmaceuticals. The reason for this is the supervision of pharmacodynamic and pharmacokinetic limits after the authority of the pharmaceutical.

What Is The Limit For Bioequivalence Study?

The limit for study is “average” Bioequivalence (ABE) if the 90% confidence timespan ratio of a mathematical method for the essential pharmacokinetic (PK) response (after log-transformation) is inside the bioequivalence limit of 80% and 125%.


In Conclusion difference between the Bioavailability and Bioequivalence study is not a big deal, but it is. For example, let’s say some people say money isn’t everything, but money is everything for the people who don’t have it. So yes there is a difference between both the terms. Hope that after reading the blog, it is easy for you to understand this term. Bioavailability is an active substance which absorbed in the body. Bioequivalence is the study that helps in checking the two identical pharmaceuticals. 

What are the Names of the Two Types of Bioavailability?

As you know, there are two types of Bioavailability available, and their names are mentioned below:-

  • Absolute Bioavailability
  • Relative Bioavailability

Is there any Difference Between Bioavailability and Bioequivalence studies?

Yes, there is a difference between Bioavailability and Bioequivalence studies. 

How many Types of Bioavailability are Available?

There are two types of Bioavailability available.

What Is The Bioequivalence Range?

The items are considered bioequivalent if the 90% certainty spans for the proportion (conventional/trend-setter) of the method for Cmax and AUC are inside the scope of 0.80-1.251

What is the FDA Bioequivalence Limit?

Mostly, the FDA Bioequivalence limit is 80 to 125%, based on the clinical judgment that a test item with BA estimates outside this reach ought to be denied market access.


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