What Postinor 2 does to your cycle (that the label doesn't say)

A faint second line on a Postinor 2 test is still a positive. A late period after taking it is usually not. Knowing which side effects are expected, and which ones need attention, is what this article covers.

What Postinor 2 is and how it works

Postinor 2 contains levonorgestrel 0.75mg. A synthetic progestogen. It works primarily by delaying or inhibiting ovulation. It does not terminate an established pregnancy.

It is available over the counter in Nigeria without a prescription. Effectiveness is time-dependent: ~95% within 24 hours, ~85% within 24–48 hours, ~58% within 48–72 hours. After 72 hours, it is not recommended.

Common side effects (expected and temporary)

These are normal and typically resolve within 1–3 days:

• Nausea: most common; affects about 20–30% of users. Taking with food reduces this.
• Headache
• Dizziness
• Breast tenderness
• Fatigue
• Abdominal pain or cramping

None of these require stopping the medication or seeking medical attention.

Effect on your next period. The most common question

Postinor 2 frequently changes your next menstrual cycle. This is expected, not a sign of failure:

• Early period: your next period may come 3–7 days earlier than expected
• Late period: it may come up to a week later than expected
• Heavier or lighter flow: both are possible
• Spotting: light bleeding within a few days of taking Postinor 2 is common

If your period is more than 1 week late: Take a pregnancy test. Postinor 2 is not 100% effective.

Side effects that warrant medical attention

These are not typical and should be evaluated:

• Severe abdominal pain (especially one-sided). Could indicate ectopic pregnancy if you are pregnant
• Heavy vaginal bleeding that soaks more than one pad per hour
• Severe vomiting within 2 hours of taking the pill. The dose may not have been absorbed; contact a pharmacist about re-dosing

Frequently asked questions

Can I take Postinor 2 more than once in a cycle? It is not recommended as a regular contraceptive method. Repeated use in one cycle increases side effects and is less effective than regular contraception.

Does Postinor 2 protect against STIs? No. It only reduces pregnancy risk.

Can it affect future fertility? No evidence that occasional use affects long-term fertility.

Postinor 2 and other emergency contraception options are available through Famasi with delivery across Nigeria. See all emergency contraception options.

The most important thing to know: side effects are expected and temporary. What's not expected, severe one-sided pain or very heavy bleeding, is the signal to seek care immediately.

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