what were the four most frequent drugs that patients were prescribed in the same month after they had been prescribed with aspirin desensitization (angioedema) since 2104?
select t3.drug from ( select t2.drug, dense_rank() over ( order by count(*) desc ) as c1 from ( select admissions.subject_id, prescriptions.startdate from prescriptions join admissions on prescriptions.hadm_id = admissions.hadm_id where prescriptions.drug = 'aspirin desensitization (angioedema)' and strftime('%y',prescriptions.startdate) >= '2104' ) as t1 join ( select admissions.subject_id, prescriptions.drug, prescriptions.startdate from prescriptions join admissions on prescriptions.hadm_id = admissions.hadm_id where strftime('%y',prescriptions.startdate) >= '2104' ) as t2 on t1.subject_id = t2.subject_id where t1.startdate < t2.startdate and datetime(t1.startdate,'start of month') = datetime(t2.startdate,'start of month') group by t2.drug ) as t3 where t3.c1 <= 4