IRCT20141127020108N9 IRCT 2025-06-12 Esfahan University of Medical Sciences Investigating the effect of lavender (Lavandula angustifolia) inhalation aroma therapy on stress, anxiety and depression of addicts Investigating the effect of lavender (Lavandula angustifolia) inhalation aroma therapy on stress, anxiety and depression of addicts under treatment hospitalized in the addiction wards 2025-07-11 anticipated 56 Complete https://irct.ir/trial/84223 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Randomization description: Block randomization with size of 4. Randomization unit: individual. Randomization tool: Random allocation software. Random chain concealment is by placing participants' codes in opaque envelopes. N/A Drug addiction. Intervention 1: Intervention group: In the Intervention group, the samples participating in the study were subjected to aromatherapy with lavender essential oil for 3 days at 10 am and 6 pm. Thus, the researcher drops 2 drops of lavender essential oil (product of Barij Essential Oil Company, Kashan) with a dropper on a sterile cloth measuring 10 cm by 10 cm and attaches it to the collar of the research unit's clothing with a clip at a distance of 20 cm from the nose. Immediately before and after the end of the intervention, their stress, anxiety, and depression levels are measured using a questionnaire. Intervention 2: Control group: The control group will be hospitalized in the ward, receive routine treatments and care, and like the intervention group, their levels of stress, anxiety, and depression will be assessed using questionnaires immediately before the study and three days after the start of the study. 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 I haven't decided yet.