Interesting

The changed blood didn't increase their strength or anything, it when it was consumed by others it would immediately make them lose their mind.

Be it by drinking it, or by breathing in a considerable quantity of it when it was mixed in the air, once either of them happened the person would end up losing their mind.

The effect of how long they'd lose their mind depended on their strength and Bai Long's strength when he poisoned them with his blood.

If they were weaker than Bai Long, they'd slip into a coma to never wake from.

If they were they were around the same strength as Bai Long they'd lose control over their body for around a week or so.

As for those who were stronger than him, the time they'd lose their control over their body would depend on much stronger they were than him. 

If it was just a difference of one realm, the time they'd lose control over their body would be close to two hours or so.