This work focuses on the integration of solar thermal systems in the Swiss pharmaceutical industry to provide the thermal energy required by their processes. In a first step, an analysis of the heat demand in this sector is carried out with a review of the processes that can benefit from solar energy. To identify the barriers of the solar system integration and define adequate solutions, two case studies are considered. In these feasibility studies, the objective is to identify the possible integration points for a solar thermal system and determine their profitability. For this purpose, simulations are carried out using two different tools (Gain Buddy and Polysun) to determine the proportion of solar energy that can be recovered by the selected pharmaceutical processes.