An interventional study of 13.6% High-Concentration 35 kDa Hyaluronan (HA35) Nasopharyngeal Care Gel in Chronic Rhinitis, Chronic Pharyngitis and Nasopharyngitis, sponsored by Nakhia Impex LLC. Completed at 1 site in China. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2026-09-23.
Sponsored by Nakhia Impex LLC · Not applicable, Interventional, and Supportive care
This is a prospective, single-arm, open-label, pilot clinical study to evaluate the efficacy and safety of nasopharyngeal administration of 13.6% high-concentration 35 kDa hyaluronan (HA35) care gel in subjects with chronic rhinitis and chronic pharyngitis. Eligible participants will receive the study gel twice daily for 10 consecutive days. The primary objectives are to assess rapid changes in nasopharyngeal discomfort, posterior pharyngeal discomfort, and nasal obstruction within 30 minutes after the first administration. Secondary objectives include evaluation of overall symptom improvement at day 10, changes in subjective mental clarity, and safety and tolerability throughout the treatment period. This is a minimal-risk, non-pharmacological supportive care intervention.
This prospective, single-center, single-arm, open-label pilot clinical study is designed to investigate the efficacy and safety of a 13.6% high-concentration 35 kDa hyaluronan (HA35) nasopharyngeal care gel for the management of chronic rhinitis and chronic pharyngitis.
Participants meeting all eligibility criteria will receive the HA35 gel via nasopharyngeal administration, one unit per nostril, twice daily (morning and evening) for 10 consecutive days.
Symptom assessments will be performed at baseline, 30 minutes after the first administration, 1, 2, and 3 hours after the first morning dose, and on day 10. Assessments include numeric rating scales (NRS) for nasopharyngeal discomfort, posterior pharyngeal discomfort and cough, nasal airflow obstruction, overall rhinitis and pharyngitis symptom severity, and subjective mental clarity.
Safety evaluations will monitor all adverse events, local tolerability, and any unexpected reactions throughout the study period.
This study involves a non-invasive, non-pharmacological non-drug intervention with minimal risk to participants. All procedures will be conducted in accordance with the Declaration of Helsinki, and written informed consent will be obtained from all subjects prior to enrollment.
173 studies on the registry are indexed under Nasal Obstruction; 31 are open to participants now.
This study's enrollment of 30 is below the median of 70 across 139 interventional studies indexed under Nasal Obstruction.
Browse Nasal Obstruction studies →Nakhia Impex LLC is the lead sponsor of 15 studies on the registry; none are open to participants now.
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Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
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An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive 13.6% high-concentration 35 kDa hyaluronan (HA35) nasopharyngeal care gel, administered via the nasopharyngeal route, one unit per nostril, twice daily (morning and evening) for 10 consecutive days. The intervention is non-pharmacological and designed to evaluate efficacy and safety in subjects with chronic rhinitis and chronic pharyngitis.
Device: 13.6% High-Concentration 35 kDa Hyaluronan (HA35) Nasopharyngeal Care Gel
A topical, non-pharmacological nasopharyngeal care gel containing 13.6% high-concentration 35 kDa hyaluronan. It is designed to support mucosal hydration and reduce inflammation in the nasopharynx. Administration is via direct nasopharyngeal application, twice daily for 10 consecutive days.
Also known as: HA35 Nasopharyngeal Gel; HA35 Care Gel
Change in Posterior Pharyngeal Discomfort and Cough NRS Score (0-10)
Change in posterior pharyngeal discomfort and associated cough intensity, measured using a 0-10 Numeric Rating Scale (NRS), where 0 = no discomfort/cough and 10 = worst imaginable discomfort/cough.
Time frame: Baseline to 30 minutes after first administration
This study is completed, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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