Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

50+: Live Better, Longer

Select An Article

Generic Drugs: Answers to Common Questions

Font Size

Are There Situations That Require Special Consideration Before Choosing a Generic?

Some drugs -- known as NTI (narrow therapeutic index) drugs -- may need special consideration if you are thinking of using the generic version. NTI drugs have a narrow margin between the amount that is safe and effective and the amount that is toxic.

These generic drugs include:

While the FDA has not had a policy restricting the use of NTI generics, some states have laws that do. In those states, if generics are used, precautions and additional monitoring are required.

The list of restricted NTI drugs varies from state to state. The FDA does not have a list of recognized NTI drugs. The FDA is revising its policy to identify drugs that should be included on such a list and to specify whether additional precautions are needed when generics are substituted for such drugs.

Your doctor should tell you if you are taking an NTI drug and what type of monitoring you need.

Should You Be Taking Generic Medication?

Generics are not available for all medications. The best way to find out if a generic is available for a medication you are taking -- and whether or not you should take it -- is to ask your doctor and pharmacist.

Some health insurance companies require that you use a generic drug, if available. If you chose to purchase the brand-name product, you may end up paying on your own or be required to pay a larger co-pay.

Generally, your pharmacist can substitute a generic drug for a brand-name drug. If there is a generic available but for some reason your doctor thinks you should still take the brand-name drug, the doctor will indicate that on the prescription by writing "Do Not Substitute."

If your pharmacist for some reason does not substitute a generic for a brand-name drug, you can ask your doctor to indicate on the prescription that substitutions are acceptable. That way, you can get the same drug for considerably less expense.

Next Article:

Today on WebMD

Eating for a longer, healthier life.
woman biking
How to stay vital in your 50s and beyond.
womans finger tied with string
Learn how we remember, and why we forget.
man reviewing building plans
Do you know how to stay healthy as you age?
fast healthy snack ideas
how healthy is your mouth
dog on couch
doctor holding syringe
champagne toast
Two women wearing white leotards back to back
Man feeding woman
two senior women laughing