Effect of Psychobiotics With Standard Antiddepressants in Treatment of Major Depressive Disorder

Recruiting now · Not applicable · Has a placebo group

Conditions studied: Major Depression

In brief

The goal of this clinical trial is to learn whether adding psychobiotics (a combination of Lactobacillus helveticus and Bifidobacterium longum) to standard antidepressant treatment works better than antidepressants alone for adults with major depressive disorder. The study will also learn about the safety of taking these psychobiotics with antidepressants. The main questions it aims to answer are: 1. Does adding psychobiotics lower depression symptoms more than a placebo (a look-alike capsule with no active ingredients)? 2. Is it safe and well tolerated when taken with standard antidepressant treatment? Researchers will compare psychobiotic capsules with placebo capsules to see whether psychobiotics improve depression symptoms when used together with standard antidepressants. Participants will: 1. Continue taking their prescribed antidepressant medicine. Be randomly assigned to receive either a psychobiotic capsule or a placebo capsule once daily for 6 weeks. 2. Complete depression assessments at the start of the study and again at 3 and 6 weeks. 3. Attend regular follow-up visits so researchers can monitor symptoms, side effects, and overall progress

Key facts

Study ID

NCT07691749

Run by

Dr Sadia yasir

People needed

86

Starts

2026-01-31

Expected to finish

2027-01-31

Last updated by the study team

2026-07-20

Who can join

Age: 18 and older, up to 60. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Patients diagnosed with major depressive disorder (According to Diagnostic \& Statistical Manual-5 criteria (as per operational definition)
• Age 18 to 60 years
• Both genders
• Patients who are able to speak and understand Urdu/ English language.
• Patients who are on stable doses of oral selective serotonin reuptake inhibitors for at least two weeks prior to enrollment in the study
• Patients with cut off score of > 24 as assessed by 17 item clinician administered Hamilton depression rating scale.

You may not qualify if…

• Severe psychiatric comorbidities (schizophrenia, bipolar disorder, co morbid substance use)
• Individuals with weakened immune systems: This includes patients undergoing chemotherapy, transplant recipients, and people with conditions like HIV/AIDS.
• Individuals on chronic medication: People on chronic pharmacological therapy, especially with anti-inflammatory drugs or who have recently used antibiotics in last 2 weeks.
• Pregnant or lactating women
• Current use of probiotics or prebiotics

Where it is running

• Allama Iqbal Medical College, Jinnah Hospital Lahore — Lahore, Punjab Province, Pakistan (enrolling)

Full record on ClinicalTrials.gov

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