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

Birth Control Health Center

Font Size

Birth Control: Pros and Cons of Hormonal Methods - Topic Overview

Progestin-only pills, implant, or shot

  • Does not protect against sexually transmitted infections or HIV
  • Causes more irregular periods or spotting between periods
  • May not be as effective when taken with certain medicines
  • Makes diabetes more likely if you have had gestational diabetes during pregnancy1
  • Progestin-only pills are less effective than combination pills, but the shot and implant are extremely effective.
  • Pills must be taken at the same time each day.
  • Implant may cause menstrual periods to stop or be very light.
  • Implant must be inserted and removed by a trained health professional.
  • Implant may cause headaches.
  • Shot may delay return of normal cycles for 6 to 8 months after the medicine is stopped, but there is no delay with pills or implant.
  • Shot may increase the risk of chlamydia or gonorrhea infection among women who are sexually exposed to these bacteria.2
  • Shot causes slight weight gain.
  • Shot may decrease levels of HDL ("good") cholesterol.
  • Shot causes bone mineral loss, so calcium supplementation is necessary.
  • Using the shot for 2 or more years can cause bone loss, which may not be fully reversible after stopping the medicine. This concern may be greatest during the teen years, when young women should be building bone mass.3
Next Article:

Birth Control: Pros and Cons of Hormonal Methods Topics

Today on WebMD

Here's what to expect.
man opening condom wrapper
Do you know the right way to use them?
birth control pills
Here's what to do next.
doctor and patient
His and her options.
Concerned teenage girl
hospital gown
Birth Control Pills Weight Gain
Ortho Evra Birth Control Patch
contraceptive pills
Young couple looking at each other, serious
woman reading pregnancy test result