Birth control shot (Depo-Provera®)

​What is Depo-Provera?

Depo-Provera® is a prescribed hormone (a progestin) that is injected into either a woman’s upper arm or buttocks by a doctor or nurse. It is given 4 times per year, every 3 months.

How does the shot work?

It works by:

• Stopping the ovaries from releasing an egg, this prevents pregnancy.
• Decreasing the lining of the uterus so that it is difficult for a fertilized egg to implant.
• Thickening the cervical mucus so that it is difficult for sperm to get to the egg.

How effective is it?

• It is 99.7% effective against pregnancy, when taken every 3 months, as recommended.
• Depo-Provera ® provides no protection against sexually transmitted infections (STIs) .

Where can I get the shot?

• A prescription is needed to get Depo-Provera ®.
• You need to get it in a medical clinic or office as a nurse or doctor uses a needle to administer Depo-Provera ®.
• Depo-Provera is not offered at the Brant County Health Unit

What are the advantages/disadvantages to using Depo-Provera®?

Advantages

• Nothing must be taken daily or used at the time of intercourse; therefore this method of birth control does not interrupt lovemaking.
• It is very effective (99.7%), when taken every 3 months.
• May decrease menstrual cramps.
• May decrease length of period.
• Some women may not get a period at all.

Disadvantages

• Does not protect against sexually transmitted infections (STIs) .
• May cause an increase in depression.
• Some women may have very irregular periods.
• Some women may gain weight.
• May take 6-8 months for a normal period to return after discontinuing use.
• May take 6-18 months to get pregnant after discontinuing use.
• Some may be allergic to Depo-Provera ®, but it is very rare.
• Side effects may continue for 8 months after your last needle.
• Risk of osteoporosis (low bone density mass) increases after 2 years use.

What is the cost of Depo-Provera®?

• Depo-Provera® costs about $35-45 per injection.
• The needle is given four times per year… so your annual cost is approximately $140-$180 /year.

What if I am late for the next shot?

• Contact your health provider. A pregnancy test is required before you receive your next shot.
• A non-hormonal method of birth control should be used until you receive your shot and for the two weeks after your shot.

What if I miss my period?

• If you are late for a shot, call the Brant County Health Unit or visit your health care provider to arrange a pregnancy test. Use a non-hormonal method of birth control during sex to prevent pregnancy and a latex condom to prevent STI.

You should not use the shot if…

• You are pregnant
• You are in your teens
• You have unexplained vaginal bleeding
• You have a history of a blood clot
• You have breast cancer
• There is anything wrong with your liver