IRCT20090527001957N8 IRCT 2019-08-22 Research Institute for Islamic and Complementary Medicine Effect of Pistacia lentiscus in functional dyspepsia Evaluation of the efficacy of topical Pistacia lentiscus oil in patients with functional dyspepsia 2019-04-16 anticipated 60 Complete https://irct.ir/trial/39104 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Blocks randomization method is used and blocks are randomly selected by using the table of random numbers. Allocation concealment will be carried out using sealed envelopes, Blinding description: Mastic oil and placebo are prepared in similar containers.Therefore, the participants during the trial, data collectors, outcome assessors, analyser and authors of the article are not aware of the type of drug and placebo. 2 Functional dyspepsia. Intervention 1: First intervention group: Mastic oil, which is made from a combination of 134 grams of Mastic gum and 536 grams of Sesame oil, topically applied three times a day after meals, and each time 10 drops are applied to the epigastric area for 4 weeks. Intervention 2: The second intervention group: Placebo containing only Sesame oil, which is taken topically 3 times a day after meals, and 10 drops per episode area for 4 weeks each time. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No more information