Let's take a minute to talk about your medication. 

This is cefazolin. It is sometimes called by the brand name ANCEF. 

Cefazolin is an antibiotic. It treats infections caused by germs called bacteria. It may also help prevent wound infections from surgery. It does not treat infections caused by viruses, like the common cold. Patients usually tolerate it well and start feeling better soon. 

Cefazolin belongs to a group of antibiotics called 'cephalosporins'. It is similar to penicillin. You should tell your doctor if you have an allergy to cephalosporins or penicillins. 

Cefazolin is commonly given as an infusion into a vein. Your caregiver will monitor your infusion site, which is usually your arm. You can help keep an eye on the area, and report any swelling or pain. 

Other side effects could occur. If you notice any changes to your body, like nausea, itching or a rash, you should let your doctor know. When taking any antibiotic, females should watch for a vaginal yeast infection and obtain treatment if it occurs. 

As with any medicine, rare but more serious side effects can occur. To help keep this medicine safe for you, your doctor will follow you closely. You should tell your doctor if you have diarrhea that is watery or bloody, even if it happens 2 or more months after your last dose. 

For best results with cefazolin, you should finish the full course. Otherwise, the infection could return and become hard to treat.