Sentence: A total of 80 patients were randomized , including 44 to the combination group ( tamsulosin 0.4 mg and tolterodine early release 4 mg ) and 36 to the monotherapy group ( tamsulosin 0.4 mg and placebo ) .
Drug combination annotation:
[{'class': 'NEG', 'spans': ['tamsulosin', 'tolterodine'], 'is_context_needed': True}]