Amphetamine (Chinese: 安非他命; Jyutping: on1 fei1 taa1 ming6) is a 2010 Hong Kong film starring Byron Pang and Thomas Price. It revolves around the story of a Chinese fitness trainer, Kafka, who meets Daniel, a business executive. The film is directed by acclaimed Hong Kong Chinese film-maker Scud, the stage name of Danny Cheng Wan-Cheung. It was nominated for a Teddy Award at the Berlin International Film Festival of 2010. It explores several themes traditionally regarded as 'taboo' in Hong Kong society in an unusually open, convention-defying way, and is one of four such films by Scud. The three others are: City Without Baseball, released in 2008, Permanent Residence in 2009, and his most recent, Love Actually... Sucks!, in 2011.

Kafka is straight while Daniel happens to be gay. The young men fall in love, believing that their love can bridge anything, despite their difference in sexuality and Kafka's drug-taking. Daniel does not regret his love for Kafka, who tries to love him back against his nature. But a flashback memory from Kafka's past makes it difficult for their relationship to work. It turns out that their addiction to love proves more fatal than the drugs they use to explore the boundaries of their friendship.