Essentially, it is any philosophy which argues that the only thing actually knowable is consciousness (or the contents of consciousness), whereas we never can be sure that matter or anything in the outside world really exists.
Levaquin and Colitis - from FDA reports. Summary. Colitis is found among people who take Levaquin, especially for people who are female, 60+ old , have been taking the drug for < 1 month, also take medication Flagyl, and have Multiple myeloma. This review analyzes which people have Colitis with Levaquin.
But the tendon related side effects of Levaquin are much more significant. This is the first drug I've heard of that specifically targets tendon tissue and damages it. People have reported tendon ruptures in the week or two after first taking Levaquin. That is fast and significant damage.