What does the combined pill contain?

Ethinylestradiol is a commonly used synthetic oestrogen, while the progestogen may be levonorgestrel or another agent. The carton and patient leaflet give the active ingredients and strength for your specific brand.

Together, the hormones suppress ovulation, thicken cervical mucus so sperm have more difficulty passing, and keep the womb lining thin. These effects depend on taking active tablets correctly and following the product's instructions for any tablet-free or inactive-tablet interval.

Some packs use the same hormone dose in every active tablet; others vary doses through the pack. Inactive tablets, when present, do not contain contraceptive hormones and mainly help maintain the daily routine.

Read the ingredient panel and note the names, strengths, active-tablet colours and pack sequence. Do not swap advice between brands: missed-pill steps and tablet schedules may differ even when both products are called combined pills.

Before starting, tell the prescriber about migraine with aura, blood clots, high blood pressure, smoking, liver or gallbladder problems, breastfeeding and all medicines or herbal products. Enzyme-inducing medicines can reduce contraceptive hormone levels and require tailored advice.

Nausea, breast tenderness, spotting and headache can occur after starting or changing a formulation. Arrange a review if these are persistent, troublesome or accompanied by a mood change that affects daily life.

Obtain urgent care for sudden breathlessness, chest pain, coughing blood, one-sided leg swelling, sudden vision or speech changes, weakness on one side, or a new severe neurological headache. Stop taking further tablets until urgent clinical advice if a serious reaction is suspected.

Ask why a particular oestrogen and progestogen were selected, which tablets are active, what to do if one is missed, and whether another formulation might suit you if side effects continue. A pharmacist can also identify ingredients from the original packaging.