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CompletedNCT03988517Updated Jun 19, 2019

Comparing Two-time Points of Thyroid Hormone Replacement During the Holy Month of Ramadan

An interventional study of timing of receiving the drug in Hypothyroidism, sponsored by Hamad Medical Corporation. Completed at 1 site in Qatar. Open to participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2019-06-19.

Sponsored by Hamad Medical Corporation · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 2 years 4 months after the study started (first participant enrolled Feb 2017, registered Jun 2019).
Phase
Not applicable
Study type
Interventional
Enrollment
106
Allocation
Randomized
Ages
18 Years to 70 Years
Sex
All
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Study summary

Muslims all over the world fast during the month of Ramadan from dawn until dusk. There is little data regarding the best timing of levothyroxine intake during the month of Ramadan where taking it on an empty stomach represents a challenge to most patients.This study aims to compare two-time points of levothyroxine intake during Ramadan in terms of change in thyroid stimulating hormone (TSH), compliance and convenience.

Read the detailed description

Hypothyroidism requires regular replacement with levothyroxine to achieve euthyroidism (thyroid hormone status within the normal range). Usually, levothyroxine is taken orally in the morning on a daily basis. In clinical practice, the investigators have observed that this levothyroxine replacement is sub-optimal resulting in higher levels of thyroid stimulating hormone. Based on this observation, the investigators conducted this study to examine whether timing of oral intake of levothyroxine during the holy month of Ramadan will affect achievement of euthyroidism. They recruited 96 hypothyroid patients taking levothyroxine, attending Hamad endocrine outpatient clinics, who were fasting during Ramadan( May-June 2017)and for whom there is no clinical contraindication to fasting. Patients were randomly assigned to two time points for taking levothyroxine:

A. 30 minutes before the Iftar meal B. 30 minutes before Suhour The primary outcome was the change in thyroid stimulating hormone (TSH) before and after Ramadan. The null hypothesis is that there is no difference in TSH between the two groups.

The findings from the study will help in the clinical care of patients with hypothyroidism in Ramadan. Hypothyroidism is common worldwide and many Muslims will require the appropriate advice regarding management of hypothyroidism in Ramadan.

02

Conditions studied

  • Hypothyroidism

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Keywords

  • fasting
03

In context

Hypothyroidism

247 studies on the registry are indexed under Hypothyroidism; 57 are open to participants now.

This study's enrollment of 106 is above the median of 78 across 128 interventional studies indexed under Hypothyroidism.

Browse Hypothyroidism studies →

Lead sponsor

Hamad Medical Corporation is the lead sponsor of 133 studies on the registry; 24 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients with Primary hypothyroidism who had stable TSH over the last 6 months prior to the study period
  • Age between 18-70 years old
  • Patients who planned to fast during Ramadan.

Exclusion criteria

Exclusion Criteria:

  • Patients with any end organ damage
  • Pregnant ladies
  • Patients with thyroid cancer
  • Patients not adhering to medications
  • Patients who had a clinical contraindication to observe fasting.
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
106 participants (actual)

Study arms

  • Active comparator
    levothyroxine at Iftar

    Patients took levothyroxine 30 minutes before breaking the fast at sunset (iftar)

    Other: timing of receiving the drug

  • Active comparator
    Levothyroxine at Suhour

    Patients took levothyroxine 30 minutes before an early morning meal before sunrise (suhour)

    Other: timing of receiving the drug

Interventions

  • Othertiming of receiving the drug

    each group took levothyroxine in different timing

06

What researchers measure

Primary outcomes

  1. Change in TSH level

    To evaluate the change in TSH level before and after Ramadan in the two groups.

    Time frame: 1 month

Secondary outcomes

  1. convenience and compliance

    To determine in each group if the timing of levothyroxine dose was convenient and check the compliance with instructions to take levothyroxine in the assigned time. Done through clinical interview

    Time frame: 1 month

07

Study locations

1 site
  • Hamad General Hospital
    Doha, 3050, Qatar
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References and documents

Individual participant data

Plan to share: No — No plan to share individual participant data, but can provide them for researchers who ask for it

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 19, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03988517
Lead sponsor
Hamad Medical Corporation
Responsible party
Dr. ZEINAB DABBOUS (Consultant Endocrine, Hamad Medical Corporation) — Principal investigator
First posted
Jun 17, 2019
Start date
Feb 1, 2017
Primary completion
Jan 8, 2018
Completion
Jan 8, 2018
Last update
Jun 19, 2019

Study contacts

Wajiha Abu Haliqa, MD
principal investigator · Hamad Medical Corporation

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jun 2019. You cannot join it, but the record below documents what was studied.

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