A Phase 3 interventional study of Nebulized fentanyl in Treatment Side Effects and Musculoskeletal Pain, sponsored by Bangkok Metropolitan Administration Medical College and Vajira Hospital. Completed at 2 sites in Thailand. Open to participants aged 65 Years to 99 Years. Per ClinicalTrials.gov, last updated 2026-10-02.
Sponsored by Bangkok Metropolitan Administration Medical College and Vajira Hospital · Phase 3, Interventional, and Treatment
Herr KA, Garand L. Assessment and measurement of pain in older adults. Clin Geriatr Med. 2001 Aug;17(3):457-78, vi. doi: 10.1016/s0749-0690(05)70080-x.PubMed 11459715 ↗
This clinical trial compares three different nebulized fentanyl dosages for older persons experiencing severe musculoskeletal pain at the emergency department.
The main objective is:
Does the effectiveness of nebulized fentanyl at dosages of 2 mcg/kg, 3 mcg/kg, and 4 mcg/kg at 30 minutes differ in older patients who report to the emergency room with pain from musculoskeletal injuries?
Secondary outcome are:
Participants will receive nebulized fentanyl for pain reduction at the pre-determined randomized dose, then researchers will follow up assessments of pain levels, vital signs, and any side effects at various intervals.
515 studies on the registry are indexed under Musculoskeletal Pain; 127 are open to participants now.
This study's enrollment of 120 is above the median of 70 across 370 interventional studies indexed under Musculoskeletal Pain.
Browse Musculoskeletal Pain studies →Bangkok Metropolitan Administration Medical College and Vajira Hospital is the lead sponsor of 23 studies on the registry; 1 is open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
COPD
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The researcher prepared fentanyl (the researcher informed the in-charge nurse to open the medicine cabinet and double-checked the dosage with the in-charge nurse). The dosage was 2 micrograms per kilogram of body weight (calculated based on the patient's actual weight in kilograms). The medication was contained in a nebulizer. It was then mixed with normal saline (0.9% normal saline) to a total volume of 5 milliliters and administered via nebulization.
Drug: Nebulized fentanyl
The researcher prepared fentanyl (the researcher informed the in-charge nurse to open the medicine cabinet and double-checked the dosage with the in-charge nurse). The dosage was 3 micrograms per kilogram of body weight (calculated based on the patient's actual weight in kilograms). The medication was contained in a nebulizer. It was then mixed with normal saline (0.9% normal saline) to a total volume of 5 milliliters and administered via nebulization.
Drug: Nebulized fentanyl
The researcher prepared fentanyl (the researcher informed the in-charge nurse to open the medicine cabinet and double-checked the dosage with the in-charge nurse). The dosage was 4 micrograms per kilogram of body weight (calculated based on the patient's actual weight in kilograms). The medication was contained in a nebulizer. It was then mixed with normal saline (0.9% normal saline) to a total volume of 5 milliliters and administered via nebulization.
Drug: Nebulized fentanyl
After the enrollment process, the main research assistant will take a brown envelope containing the randomization and hand it to the principal investigator in numerical order. The principal investigator will then open the envelope to determine the group assignment for the patient, revealing which fentanyl nebulization dosage group (2 mcg/kg, 3 mcg/kg and 4 mcg/kg) the patient will be placed in. In this study, participants will be divided into three groups as previously described. We evaluate pain score at 0, 15, 30, 45, 60, 75, 90, 105 and 120 minutes after receiving nebulized fentanyl by a train research assistance who is blind from the treatment dosage.
Also known as: Nebulized fentanyl dosage
Efficacy in pain reduction following nebulized fentanyl administration at different dosages.
Efficacy in pain reduction following nebulized fentanyl administration at dosages of 2 mcg/kg, 3 mcg/kg, and 4 mcg/kg in elderly patients presenting to the emergency department with musculoskeletal pain, using verbal numerical rating scale (VNRS) VNRS score ranges from 0 to 10, with a higher score indicating more severe pain. Ten indicates the worst pain, and zero indicates no pain.
Time frame: 30 Minutes
Adverse events following nebulized fentanyl administration at different dosages.
Adverse events following nebulized fentanyl administration at dosages of 2 mcg/kg, 3 mcg/kg, and 4 mcg/kg in elderly patients presenting to the emergency department with with musculoskeletal pain
Time frame: 0, 15, 30, 45, 60, 75, 90, 105, 120 Minutes
Events of rescue therapy following nebulized fentanyl administration at different dosages.
Events of rescue therapy following nebulized fentanyl administration at dosages of 2 mcg/kg, 3 mcg/kg, and 4 mcg/kg in elderly patients presenting to the emergency department with musculoskeletal pain
Time frame: 30, 45, 60, 75, 90, 105, 120 Minutes
Plan to share: No
Ran from Jul 2024 to primary completion in Jul 2025, 12 months.
Completion moved once since we started tracking on Sep 25, 2026: Jul 2025 → Dec 2025, on Oct 2, 2026.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
Herr KA, Garand L. Assessment and measurement of pain in older adults. Clin Geriatr Med. 2001 Aug;17(3):457-78, vi. doi: 10.1016/s0749-0690(05)70080-x.PubMed 11459715 ↗
Herr KA, Garand L. Assessment and measurement of pain in older adults. Clin Geriatr Med. 2001 Aug;17(3):457-78, vi. doi: 10.1016/s0749-0690(05)70080-x.PubMed 11459715 ↗
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is completed, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Studies of the drug tested here: Fentanyl
Bangkok Metropolitan Administration Medical College and Vajira Hospital