Should we continue testing on animals?

It is not a secret that a lot of companies, mainly pharmacies such as Bayer or Novartis, test their products on animals. On the majority of these tests, the products that are tested are very harmful for the animals; they can intoxicate them, or in the worst case, kill them. Is there a more friendly solution to test this products, a solution that doesn’t involve animal testing at all?

There are various alternatives different form animal testing, which include testing on human tissues, computer models, volunteer studies or cell cultures, this last one consists on growing miniature organs from animal or human cells in organs.

I think doing this tests on animals is not good in the sense that most of the times they are suffering, but also it may be necessary to help hummanity when looking for the cure of certain disease or things like that.