Chemist Max E. Hennig founds HENNIG ARZNEIMITTEL in Berlin. HENNIG conducts research in the field of therapeutically effective organ extracts. The first, and initially the only, product is a liver extract. This is followed by a heart muscle extract and plant-based medication after the First World War.
After the death of Kurt Moschner, his daughter Helga Schleenhain takes over management of the company, together with her husband Wolfram Schleenhain. The existing product range is expanded to include a variety of generic medicines, with a focus on cardiovascular, metabolic, neurological and psychiatric indications. In light of increased contract manufacturing and development, accompanied by steady growth in staff numbers, numerous extensions and new buildings are added to the company premises.
The two sons, Holger Schleenhain and Dr Kai Schleenhain, assume management of the company. They continue to take products global and expand the product range to include a number of new launches and over-the-counter products. By this time, HENNIG ARZNEIMITTEL employs roughly 280 people. Production volume amounts to around 600 million tablets per year.