Terminally-ill Victorians will be able to legally end their own lives after State Parliament passed the government's voluntary assisted dying bill on Wednesday morning.

After more than 100 hours of sometimes rancorous debate, the bill had a low-key final passage through the lower house just before midday.

But the government has acknowledged that people with painful terminal illnesses will be disappointed that the laws will not come into force until 2019.

The legislation calls for an 18-month "implementation period" to finalise outstanding details and the exact nature of the lethal drugs that will be used.