hello, thank you for using healthcare magic, diane and elestra both contains same pharmacological substance in short both drug are same,both are oral contraceptive pill ,only its brand name are different.. continue taking elestra or diane both are same. take each pill daily at fix time . it is effective birth control method. if you forget to take any pil then take it as soon as you remember and continue rest of the pill as usual .plus use additional method like condom.. if you forgets pill and have unprotected intercourse then take i pill within 72 hours of unprotected sex and its other dose after 12 hours.. hope this helps you.. take care..