Comparative bioequivalence study of Azithromycin 250 mg Capsule of Shafa Pharmed and Zithromax of Pfizer as reference in 24 healthy subjects under fasting
This study will be performed to compare the pharmacokinetics and invivo parameters of Azithromycin 250 mg capsule formulation as a test product with Zithromax 250 mg capsule of Pfizer formulation as a reference product and to evaluate the bioequivalence of these two formulations.
Design
Non-blinded, randomized, crossover in vivo bioequivalence study in 24 healthy males under fasting conditions. Block randomization for a treatment sequence of Test/Reference or Reference/Test is used
Settings and conduct
In each period, volunteers will receive a single dose of the treatment in the Noor Research and Development Institute (Tarasht, Tehran). 2 dosing periods will be separated by a 14-day washout period.
Participants/Inclusion and exclusion criteria
Inclusion Criteria: Healthy subjects (male) between 18– 55 years of age and Body Mass Index (BMI) within 15% of normal range according to the accepted normal values between 18.5 and 30 (inclusive), calculated as kg/m2. Subjects with no significant diseases or clinically significant abnormal findings during screening, medical history, clinical examination and laboratory evaluations. Exclusion Criteria: Subjects with known allergy to the products tested. Smoking more than 10 cigarettes per day and could not tolerate cigarette cessation during each clinical period.
Intervention groups
Intervention group 1: Azithromycin 250 mg capsule, produced by Shafa Pharmed Co. is the test product. In each period, 12 of 24 subjects will be given a single oral dose of this product. Intervention group 2: Zithromax 250 mg capsule, produced by Pfizer is the reference product. In each period, 12 of 24 subjects will be given a single oral dose of this product.
Main outcome variables
Peak Plasma Concentration
General information
Reason for update
Acronym
IRCT registration information
IRCT registration number:IRCT20180620040164N108
Registration date:2026-10-17, 1405/07/25
Registration timing:prospective
Last update:2026-10-17, 1405/07/25
Update count:0
Registration date
2026-10-17, 1405/07/25
Registrant information
Name
Behzad Montaha Sangari
Name of organization / entity
Noor research and educational institute (Tavan)
Country
Iran (Islamic Republic of)
Phone
+98 21 6600 7026
Email address
info@tavaninstitute.ir
Recruitment status
Not yet recruiting
Funding source
Expected recruitment start date
2027-01-08, 1405/10/18
Expected recruitment end date
2027-01-15, 1405/10/25
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
Comparative bioequivalence study of Azithromycin 250 mg Capsule of Shafa Pharmed and Zithromax of Pfizer as reference in 24 healthy subjects under fasting
Public title
Comparative in vivo evaluation of 2 formulations of Azithromycin 250 mg Capsule
Purpose
Treatment
Inclusion/Exclusion criteria
Inclusion criteria:
Healthy subjects (male) between 18– 55 years of age.
Body Mass Index (BMI) within 15% of normal range according to the accepted normal values between 18.5 and 30 (inclusive), calculated as kg/m2
Subjects with no significant diseases or clinically significant abnormal findings during screening, medical history, clinical examination and laboratory evaluations.
Subjects with normal vital signs
Subjects who agree with patient consent form.
Exclusion criteria:
Subjects with known allergy to the products tested.
Smoking more than 10 cigarettes per day and could not tolerate cigarette cessation during each clinical period.
Subjects who has used any prescription or OTC drugs 14 days prior to the initiation of study and unable to refrain from the concomitant medications.
History of alcohol or drug abuse.
Heavy drinker of caffeine, grapefruit juice or caffeinated drinks or who are on special diet (such as vegetarians) or do exertional physical activity.
A history of difficulty with donating blood or donation of more than 500 ml blood within 7 days prior to the start of the study.
Age
From 18 years old to 55 years old
Gender
Both
Phase
Bioequivalence
Groups that have been masked
No information
Sample size
Target sample size:
24
Randomization (investigator's opinion)
Randomized
Randomization description
The randomization schedule will be generated with https://www.sealedenvelope.com/simple-randomiser/v1/lists. A 2*2 block randomization list is created. We have 12 blocks and within each two volunteer numbers (allocated after screening) for all 24 volunteers. According to this list, a treatment sequence of Test/Reference or Reference/Test will be given to each volunteer.
Blinding (investigator's opinion)
Not blinded
Blinding description
Placebo
Not used
Assignment
Crossover
Other design features
Secondary Ids
empty
Ethics committees
1
Ethics committee
Name of ethics committee
Research Ethics Committee of the Faculties of Pharmacy, Nursing and Midwifery – Shahid Beheshti Univ
Street address
Shafa Pharmed Industrial Group Co., Barakat Pharmaceutical Industrial Town, Barakat Street, Kordan, 10th Kilometer of the Karaj–Qazvin Freeway, Iran
Using non-compartmental model of Win-Nonlin Professional software version 3.2.A (Pharsight Corporation, USA)
Intervention groups
1
Description
Intervention group: One Azithromycin 250 mg Capsule , produced by Shafa Pharmed. is the test product. In each period, 12 of 24 subjects will be given single oral dose of this product. After 14-day wash-out period the intervention 2 will be given to these subjects.
Category
Treatment - Drugs
2
Description
Intervention group: One Zithromax 250 mg capsule, produced by Pfizer is the reference product. In each period, 12 of 24 subjects will be given single oral dose of this product. After 14-day wash-out period the intervention 1 will be given to these subjects.