Question 1

How long does it take for Mercilon to become effective?

Accepted Answer

If you start on day 1 of your period, protection is immediate. If started later, you must use additional contraception (e.g., condoms) for the first 7 days.

Question 2

What should I do if I miss a Mercilon pill?

Accepted Answer

If you are less than 12 hours late, take it immediately and continue as usual. If more than 12 hours late, follow the missed pill instructions in the leaflet – you may need emergency contraception.

Question 3

Can I take Mercilon while breastfeeding?

Accepted Answer

Mercilon is not usually recommended during breastfeeding as oestrogens may reduce milk production. Discuss progestogen‑only options with your doctor.

Question 4

Does Mercilon cause weight gain?

Accepted Answer

Weight gain is reported uncommonly (affects up to 1 in 100 users). Any change is usually modest and not seen in all women.

Question 5

Can I delay my period with Mercilon?

Accepted Answer

Yes, by starting a new strip immediately after finishing the current one (skip the pill‑free week). You may experience breakthrough bleeding, but protection is maintained.