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Key Information:

  • Why Watch: Taking the progesterone-only pill (often called the “mini-pill”) needs a different routine than the combined pill. This video explains the specific rules you must follow to make sure it remains effective, and what changes to expect with your periods.
  • The Difference: Unlike the combined pill, this pill contains no oestrogen. It is generally considered very safe, but consistency is important.

How to Take It: The Golden Rules

  • Same Time, Every Day

The most important rule is consistency. You must take your pill at the same time every single day. Being late with this pill can affect your protection against pregnancy more than with other types.

  • No Breaks

There is no 7-day break. You take one pill every day. When you finish one 28-day pack, you start the next pack straight away on the following day.

Starting the Pill

  • During your period (Days 1-5): If you start taking it on days 1 to 5 of your period, you are usually protected from pregnancy straight away.
  • Any other time: If you start on any other day, you must use additional contraception (like condoms) for the first 2 days of taking the pill.

What to Expect: Side Effects and Risks

Changes to Periods

This is the most common side effect. Because there is no break in the pills, your bleeding pattern will likely change.

  • Periods may become irregular, more frequent, or lighter.
  • They may stop altogether (this is common and safe).
  • You may experience “spotting” between periods.

Health Risks

The mini-pill is generally very safe.

  • Ovarian Cysts: There is a small possibility of developing fluid-filled sacs on the ovaries. These are usually harmless and often disappear without treatment.
  • Breast Cancer: There is a very small potential link, but evidence is limited and any increased risk is thought to be minimal.

Important Note: The mini-pill does not protect you against sexually transmitted infections (STIs). You must use condoms for STI protection.

What Happens Next?

If you are struggling with irregular bleeding that is bothersome, or if you are worried about any other side effects, please let us know. We can review your contraception to ensure it is the right fit for you.

Discuss Your Contraception
 

Further Information

For more information on the progesterone-only pill, where to get it, who can take it, side effects, risks and more, please visit the NHS website.

Learn more about the progesterone-only pill

Last reviewed: 27 December 2025
Next review due: 27 December 2028