The significant development of nanotechnology started in the 20th century, but there is evidence that it has been used since much earlier - from the 4th century AD. Nowadays there are applied many types of nanometric particles like in electronics, cosmetics and the military industry. It is important to emphasize the use of nanomaterials in medical specialities such as tumour therapy, treatment of bacterial infections, and support to diagnose certain human conditions.  Kulcsszavak: nanotechnológia, gyógyszerészet, nanopartikulumok története, nanopartikulumok használata