Can I use an insect repellent and a product containing sunscreen at the same time?

Yes. People can, and should, use both a sunscreen and an insect repellent when they are outdoors. Follow the instructions on the package for proper application of each product. In general, the recommendation is to apply sunscreen first, followed by repellent.

http://www.cdc.gov/westnile/faq/repellent.html