Umm... If you mean what you can guarantee if you get rat poison most likely rabies. But if you mean what you can guarantee if you set a rat poison and the rat catches on to it and gets stuck on the poison, it will take a few days for them to die because it's a slow and painful death due to their blood thinning and their organs failing slowly.
arsenic
You can use poisons or traps.
Ammonia has a very strong odor. It will deter rodents, including mice and rats. It is a more natural deterrent than poisons.
Yes, the commonly used poisons for rats and mice will kill raccoons. Raccoons can also die from eating a dead rat or mouse that was killed with poisons.
Rats have poor eyesight but great hearing and smell. Over decades, rats have adapted to be very wary of humans; rats breed and reproduce at alarming rates, and like birds, are excellent disease carriers, so they have been exterminated and feared by humans for a long time. Even my own pet rat is cautious when I feed him new treats. They are definitely smart enough to learn to avoid poisons and traps. I have even noticed how difficult it was to recapture my rat when he was an adolescent and he escaped. Poisons and traps are still used to rid homes of rats, and they are still effective; however, rats in particular can often cause problems when people need to get rid of wild rats, because of their ability to learn.
Unscientifically it poisons them and slows their central nervous system activity and stops internal organ functioning.
As years go by and some countries prohibit the use of pesticides yes, rats are adapting to modern poisons. When you put poison out for a rat you are also killing other good bugs, rodents not to mention birds or possibly your pets. The best thing to do is get a dog (ratter) or a cat. I had a Cairn and have a cat and the rats went away. I never had a rat in my home (my cat brought one in once and it's the one and only time I shrieked so loud I almost split the sound barer.) The rat was stunned and my brother picked it up in his jacket and put it outside. Rats are usually attracted near railroads where there is grain, or by garbage left out by humans. If you feed birds then you may get rats. There are more environmentally safe forms of getting rid of rats and it's best to let the exterminator do his job.
As of 31/12/2016, authorised sellers of poisons are allowed to sell non-poisons, part 2 poisons, part 1 poisons, part 1 schedule 1 poisons, part 1 schedule 1 schedule 3 poisons, antibiotics, and dangerous drugs.
In foods grown organically, there are no poisons.
In tobacco there are over 400 poisons
Anticoagulant rodenticides such as warfarin and brodifacoum are commonly used as rat poisons. These compounds work by preventing blood clotting, leading to hemorrhaging and ultimately death in rats.
there are 200 known poisons i tobacco smoke