Résumé
In this thesis, we will concentrate on four pathologies well known by the general public, for which patients first seek advice from pharmacists or self-medicate before consulting a doctor. The pathologies in question are: constipation, acid reflux, cystitis and insomnia. For each of these pathologies, we will study the epidemiology, the physical effects, the symptoms, the diagnolsis, the standard treatments and finally, alternative treatments. Much emphasis is put on the alternative treatments of these problems, in particular aroma therapy, nutritional therapy and phytotherapy.