A man, 37, accused of pouring green pellets of rat poison into his girlfriend's instant coffee will face court later this month, police say.
The woman, 32, allegedly noticed strange-coloured granules in an instant coffee jar after drinking several cups at her home in Sydney's south-west on May 1.
She did not suffer any reaction but went to Campbelltown Hospital as a precaution.
Camden Police Inspector Stephen Parry said police did not know why the man allegedly tried to poison his girlfriend.
''She noticed small, odd-coloured granules in the coffee jar and obviously there was some taste issues there. Thank heavens they don't make coffee the same colour as rat poison.''
Police searched the couple's home and allegedly found other items that supported the woman's claim of poisoning.
The accused was arrested after he handed himself in at Narellan police station on Tuesday. He was charged with using poison to endanger life and administering poison with the intention of injuring. The man was granted conditional bail to appear at Camden Local Court on August 29.