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The risk of gastrointestinal bleeding during the treatment with antiagregants and anticoagulants, the risk of bradycardia in beta-blockade, possible interactions with other medications lowering the heart rate are discussed.
 gastrointestinal bleeding: Effect; antiagregants and anticoagulants: Treatment; antiagregants: Treatment.Drug; anticoagulants: Treatment.Drug; antiagregants: Combination.Drug; anticoagulants: Combination.Drug
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: adverse event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Subject.Disorder, Treatment.Route, Subject.Race, Treatment.Time_elapsed, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 gastrointestinal bleeding: Effect; antiagregants and anticoagulants: Treatment; antiagregants: Treatment.Drug; anticoagulants: Treatment.Drug; antiagregants: Combination.Drug; anticoagulants: Combination.Drug