What is the difference between first generation cephalosporins and the second and third generation?

First Generation :

1.Cephalexin.

2.Cefadroxil

3.Cephazolin

4.Cefaradin.

Second Generation:

1.Cefaclor

2.Cefonicid.

3.Cefoprozil.

4.Cefouroxime.

Third Generation:

1.Cefdinir.

2.Cedotaxime.

3.Ceftriaxone.

4.Ceftazidime.

Fourth Generation:

1.Cefopime.

2.Cefoselis.

3.Cefozopam.

4.Cefdidim.

5.Cefopirom.

6.Cefoquinone.

** You may find more for each generation, but those are the most common :)