Lyric discussion by polyethylenes1&2 

Cover art for Suffer lyrics by Smashing Pumpkins, The

Having said that: to me this is a love song. Perhaps he feels transended by a love he feels for somebody and at first he feels that love is returned, but towards the end he begins to think it isn't so... that he was wrong all along... too late to discover peace of mind... and perhaps it sent him down the wrong road as he went into the trip hense "too late to recover". (you see the song isn't about the drug, but about how the drug effects his feelings... to me anyway)