Question: In 2010, how many single patients took Nitrofurantoin 5 mg/ML [Furadantin] to cure cystitis?
SQL: SELECT COUNT(DISTINCT T1.patient) FROM patients AS T1 INNER JOIN medications AS T2 ON T1.patient = T2.PATIENT WHERE T1.marital = 'S' AND T2.REASONDESCRIPTION = 'Cystitis' AND T2.DESCRIPTION = 'Nitrofurantoin 5 MG/ML [Furadantin]' AND strftime('%Y', T2.START) = '2010'