animals needs to be killed:to test on animals they need to be
killed for our experimentation after the use .few gets injured
making their life risky
animal testing is very expensive:as animals need to be
fed,housed,cared and treated with drugs
time consuming:animal testing may occur more than once . it
takes a long time for the outcome of the result
failure of experimentation: reaction of few drugs in humans
body is quite different from animals body.
failure of research:some substances tested may never be used
again either because they get disapproved by the public or may be
beacuse it was not effective as expected.