Breaking, crushing or dissolving the lozenge has no negative effect on the efficacy of the ingredients.
You are instructed not to chew the lozenge only because doing so will shorten the time it remains in your mouth, and thereby reduce the time available for absorption through the mucous membranes of your mouth. One of the keys to Banjo’s efficacy is that many of the active ingredients are believed to be absorbed directly into the bloodstream through the lining of the mouth. if the lozenge spends less time in your mouth, it means less absorption and less efficacy.
Breaking or crushing the lozenge will speed dissolve time for those using Banjo as an herbal tea for pain relief.