Thanmathra ( Malayalam: തന്മാത്ര, English: Molecule) is a 2005 Indian Malayalam-language drama film written and directed by Blessy, based on Padmarajan's short story "Orma". It portrays the effects of Alzheimer's disease on the life of Ramesan Nair (Mohanlal) and his family. The film collected three times its budget at the box-office and completed 150 days run. Thanmathra won five Kerala State Film Awards, which includes the Best Film, Best Actor, Best Director, Best Screenplay, and a Special Mention Award for the debutant actor Arjun Lal. It also won the Best Feature Film in Malayalam Award at the 53rd National Film Awards.