YOU SAID:
Adam went to get drugs
INTO JAPANESE
アダムは薬を飲みに行った
BACK INTO ENGLISH
Adam went for a medicine drink
INTO JAPANESE
アダムは薬を飲みに行きました
BACK INTO ENGLISH
Adam went to drink some medicine
INTO JAPANESE
アダムは薬を飲みに行った
BACK INTO ENGLISH
Adam went for a medicine drink
INTO JAPANESE
アダムは薬を飲みに行きました
BACK INTO ENGLISH
Adam went to drink some medicine
it is unlikely that this phrase will ever reach equilibrium