d tried over the country allergy drops like Ketotifen fumarate (in Alaway, Zaditor or
generic), which is what I had luck with (in addition to the fexodenadine general allergy medication I take), or the prescription ones like pataday that many use.
Its best to be cautious about GPC, since there is some risk of getting bumps that either don't go away once you stop wearing contacts, or they take a long time to do so (mine are at 2+ years and not completely gone).