Water is an indispensable resource for all aspects of life. However, its quantities are limited and water pollution is a problem we face on a daily basis. Recently, more and more attention has been given to pharmaceutical micropollutants. Pharmaceuticals are chemicals that are used because of their biological activities, that is, to improve health. The aftermath of pharmaceuticals that have already entered the environment is apparent in lower vertebrates, while there are no known effects on human health. Conventional methods for water purification do not eliminate pharmaceuticals, so it is necessary to explore new methods that will be useful. One of these methods is photocatalysis. Photocatalysis can be interpreted as a change in the rate of reaction due to the action of light on a photocatalyst which has adsorbed impurities. It is the adsorbed impurities, that is, the adsorption process, which is the foundation of this final paper. This work aims to determine the adsorption of diclofenac and carbamazepine pharmaceuticals on TiO2-rGO nanocomposite photocatalyst. Titanium dioxide is usually used as a photocatalyst because it does not affect the environment, it is chemically stable, catalytically active and it is inexpensive. However, the problem is a wide bandgap that only allows UV radiation, which accounts for less than 5 % of solar radiation, to activate electrons needed for photocatalysis. This is why it is paired with another semiconductor, graphene oxide. By reducing GO to reduced graphene oxide, the bandgap can be controlled. The adsorption of carbamazepine and diclofenac at pH 4, 6 and 8 was monitored and the effect of rGO content in TiO2-rGO was investigated. The minimum adsorption of carbamazepine and the high adsorption of diclofenac at pH 4 were determined.