The U.S. has vast reserves of natural gas that are commercially viable as a result of advances in horizontal drilling and hydraulic fracturing technologies enabling greater access to gas in shale formations.
Yes, you can open the Keflex capsule and take the contents. However, that way you may miss some of the dose if all the contents of what you mixed it in don't get eaten. And the taste of the antibiotic powder may not be so nice.
You should not use cefazolin if you have ever had a severe allergic reaction to any type of cephalosporin antibiotic (Omnicef, Cefzil, Ceftin, Keflex, and others). You should not use this medicine if you have ever had a severe allergic reaction to cefazolin or any other cephalosporin antibiotic, such as: