Patient X (2009)

Patient X is a Filipino horror film directed by Filipino director Yam Laranas and stars Richard Gutierrez and Cristine Reyes. It is co-produced by GMA Films, Viva Films, and RGUTZ Productions. This is the first movie of Richard Gutierrez under Viva Films Productions. 

After twenty years, local police capture the murderer of the older brother of a young boy. Now a doctor, he must go back to his old town and face the murderers himself. He then discovers that the murderers are Aswangs (folkloric Filipino vampire-like creatures) and they pose a deadly threat not only to him but also for the entire town.