Nycticebus spp, commonly known as the slow lorus, is a small nocturnal primate found mainly in Asia. The adult slow loris weighs between 265 g and 1150 g depending on the type of species. It has a characteristic round head with large, forward-facing eyes. Slow lorises are known for their poisonous bite and are the only venomous primates. To date, there have been two published cases of slow loris bite in humans. This case report illustrates a case of anaphylactic shock following a bite of a wild Kayan slow loris (Nycticebus kayan) to a young man at Mulu District, in a remote area of Sarawak, Malaysian Borneo. The patient developed dyspnoea, a feeling of suffocation, swollen lips and cramp-like sensations over both hands. He subsequently developed syncope and hypotension. The patient was clinically stable following intramuscular injection of adrenaline 0.5 mg stat dose.