Quit-smoking basics
Learning Center
Rheumatoid factor
Rheumatoid factor — This blood test can help diagnose autoimmune disorders such as rheumatoid arthritis, Sjogren syndrome and lupus.
Complete blood count (CBC)
Learn what to expect from having this common blood test, why it's done and how to prepare.
Quit-smoking products: Boost your chance of success
Many quit-smoking products are available and using one or more can greatly increase your chance of success. Check out your options.
STD testing: What's right for you?
Find out how your risk factors affect the types of tests you'll need for sexually transmitted infections (STIs).
Cancer blood tests: Lab tests used in cancer diagnosis
Blood tests used to help diagnose cancer include CBC and tumor marker tests. Other tests and procedures are needed to confirm a cancer diagnosis.
Quit smoking: Try stop-smoking products
Don't be afraid to use stop-smoking products to help you quit. Stop-smoking products are a legitimate way to handle withdrawal symptoms and tobacco cravings. Several types of nicotine-replacement products are available. Nicotine patches, gum and lozenges, are available over-the-counter. Nicotine nasal spray and the nicotine inhaler are available by prescription. In addition, two quit-smoking medications that don't contain nicotine are available by prescription. Talk to your health care provider about which stop-smoking products may be right for you.
Smokeless tobacco products
Learn the risks of using products such as chewing tobacco, snuff and snus.
Slide show: Blood sugar testing
Blood sugar testing is an essential part of diabetes care. See how it's done.
Doppler ultrasound: What is it used for?
A Doppler ultrasound measures blood flow and pressure in blood vessels.
Biopsy: Types of biopsy procedures used to diagnose cancer
Learn about the different ways of collecting suspicious cells to test in the lab to diagnose cancer.
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