Logynon tablets are a type of hormonal contraception commonly known as 'the pill' or combined oral contraceptive pill. Logynon tablets contain two active ingredients, ethinylestradiol and levonorgestrel. These are synthetic versions of the naturally occurring female sex hormones, oestrogen and progesterone. Ethinylestradiol is a synthetic version of oestrogen and levonorgestrel is a synthetic form of progesterone. Logynon is a triphasic pill, meaning that over the course of three weeks, it overrides your normal hormone cycle. You should take the pill every day for 21 days before stopping for a 7-day pill break. Headache, nausea, weight gain and sore breasts can be the possible side effects.