Inclusion Criteria:  Healthy male and female subjects. Age between 18 and 40 years (both included). Anxiety questionnaire PAF (pre-selection of subjects) - values above T> 60 are regarded as conclusive. Inconclusive case history and diagnosis. Subject must be capable of giving informed consent. Acceptance of written consent to participate in the study after education in written and oral form (informed consent).  Exclusion Criteria:  Acute or chronic disease with an impact on the study, which becomes obvious by case history or clinical examination. Clinically relevant pathological findings from clinical and laboratory findings. Presence of clinically relevant pathological EEG features or artifact-free portion of the screening EEG <30%. Clinically relevant allergic symptoms. Detection of alcohol at the time of initial examination (day SC) or on study day A (positive alcohol test) or by case history. Detection of drugs (positive drug test) at the time of initial examination (day SC). Consumption of clinically relevant medication during last fourteen days before and during the active study period based on the notification of the subject or his case history. Consumption of medication with primarily central action (i.e. psychotropic drugs or centrally acting antihypertensives). Known intolerance / hypersensitivity (allergy) to plant derived extracts (Passion flower dry extract) or any of the ingredients of the investigational product (anamnestic). Presence of a rare, genetic disease such as fructose intolerance, glucosegalactose malabsorption or sucrase-isomaltase deficiency (anamnestic). BMI (Body Mass Index) <18 or> 32. Consumption of unusual quantities or misuse of coffee (more than 4 cups a day), tea (more than 4 cups a day) or tobacco (more than 20 cigarettes per day). Smoking on day of A.