I believe so. I wouldn't over seed then put down crabgrass preventer. That doesn't work well at all.
How does crabgrass preventer work?
Crabgrass preventer, also known as pre-emergent, works by preventing crabgrass and other weed seeds in your lawn soil from germinating. In fall, crabgrass seeds spread and in the spring, once it gets warm, they begin to grow.
How does it harm my lawn?
Crabgrass preventer is a non-selective product that prevents everything (including grass seed) from germinating. If you do have to seed in the spring and you've applied your crabgrass preventer, make sure you rake the bare spot, breaking the pre-emergent barrier. Or make sure you seed after applying crabgrass preventer.
How can I protect my lawn?
Although it can be frustrating having to reseed your lawn after using crabgrass preventer. It is better than skipping crabgrass preventer entirely and having to replant all of the areas where weeds took over your lawn the summer before.