Best way or medicine to drop pregnancy in earlier days?

Ru486: The only to terminate a pregnancy early is via surgery such as a D&C or ru486 the medical abortifiacient.

Abortion: I'm assuming this is regarding your partner since you listed yourself as "male". Anyway, there is no single best way to abort an undesired pregnancy. Instead, talk to your/her family doc and/or obstetrician to review options (drugs vs surgery) available to you where you live eg puerto rico. Also need to take into account patient's health, religion & cultural mores.