A Phase 2 interventional study of Topical Bromelain and 0.1% topical triamcinolone acetonide in Oral Lichen Planus, sponsored by Cairo University. Recruiting at 1 site in Egypt. Per ClinicalTrials.gov, last updated 2026-06-09.
Sponsored by Cairo University · Phase 2, Interventional, and Treatment
Bromelain, an enzyme extract derived from pineapples, has shown promise due to its anti-inflammatory and wound-healing properties. However, its efficacy in treating oral mucosal ulcers remains unexplored. This study aims to provide clinical evidence on the efficacy of bromelain for managing OLP, potentially offering a safer and more effective treatment option.
142 studies on the registry are indexed under Lichen Planus, Oral; 27 are open to participants now.
This study's planned enrollment of 42 is close to the median of 39 across 101 interventional studies indexed under Lichen Planus, Oral.
Browse Lichen Planus, Oral studies →Cairo University is the lead sponsor of 4,941 studies on the registry; 1,458 are open to participants now.
Of its 37 completed or terminated interventional studies of FDA-regulated products, 5 (14%) have results posted.
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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.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
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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.
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Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
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Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
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Participants in this group will receive topical bromelain incorporated into an orabase. Patients will be instructed to apply the formulation four times daily No additional topical medications will be permitted.
Dietary Supplement: Topical Bromelain
This group will receive topical 0.1% triamcinolone acetonide The treatment will be applied four times daily, following the same instructions and precautions as in Arm 1
Drug: 0.1% topical triamcinolone acetonide
Participants in this arm will be treated with a combination formulation containing both topical bromelain and 0.1% triamcinolone acetonide in orabase. Application instructions will be identical to those in the other arms: four times daily.
Combination Product: Combination of Topical Bromelain and Triamcinolone Acetonide in Orabase
A natural enzyme-based formulation derived from pineapple, bromelain in orabase is being investigated for its anti-inflammatory and wound-healing properties. As a non-steroidal alternative, it offers a potentially safer treatment option with minimal side effects.
A corticosteroid-based standard treatment for OLP, triamcinolone acetonide in orabase is used for its strong anti-inflammatory and immunosuppressive effects. It serves as the conventional treatment versus novel therapy in this study
This novel formulation combines the enzymatic, healing properties of bromelain with the anti-inflammatory property of triamcinolone. It is designed to provide enhanced therapeutic effects through synergistic action, potentially reducing the required corticosteroid dose while improving clinical outcomes.
Clinical improvement
Clinical improvement will be measured using Thongprasom et al. scoring system. In Thongprasom et al. scale, lesions are given score as follows: 0, no lesions, normal mucosa; 1, Mild white striae, no erythematous area; 2, White striae with atrophic area \< 1 cm2; 3, White striae with atrophic area \> 1 cm2; 4, White striae with erosive area \< 1 cm2 and 5, White striae with erosive area \> 1 cm2 (Thongprasom et al., 2003).
Time frame: Recorded at baseline, and weekly for 4 weeks
Pain intensity
Pain intensity will be measured using Visual analogue scale (VAS), VAS is a self-reported pain score ranging from 0 to 10 (Cheng et al., 2012) at baseline, daily for the first week, then weekly for the remaining 3 weeks.
Time frame: baseline, daily for the first week, then weekly for the remaining 3 weeks.
Oral health-related quality of life
Oral health-related quality of life using Oral Health Impact Profile-14 (OHIP-14) Oral health-related quality of life is a five-point Likert-type scale used in scoring each item of the OHIP-14. Responses are coded 0 = never', 1 = hardly ever', 2 = occasionally', 3 = fairly often', 4 = very often'. Item responses are summed to produce an OHIP-14 total score. Total OHIP-14 scores range from 0 (no impact) to 56 (all of the oral health problems are experienced very often). High scores indicates a poor oral health-related quality of life (Wiriyakijja et al., 2018).
Time frame: at baseline, and weekly for the 4 weeks.
Started Feb 2026 (actual). Primary completion is estimated for Jul 2026, 5 months after the start.
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Studies of the drug tested here: Bromelains