Prevalence and use of herbal products in the Czech Republic: over-the-counter survey among adult pharmacies clients.

Objectives: To analyse which species of herbs are preferred by Czech adult respondents, the most important predictors influencing their use, and information sources used.

Method: Data were collected face-to-face via an interviewer-administrated structured questionnaire from convenience sample of adults from metropolis, as well as peri-urban and rural areas, from February to June 2007.

Results: There is a high prevalence (56.