Are anti-histamines considered anti-cholinergics? what about ventolin for asthma, is that anti-cholinergic?

Neither are, really.: Ventolin is albuterol...A sympathetic nervous system stimulant that causes airways to dilate. Anti-histamines are not anticholinergic, per se, but in high doses or in the elderly they can cause some of the same neurological symptoms as anticholinergics. Most newer antihistamines are not a problem though, because they penetrate the brain less well - which is why they don't make you drowsy.