To view your cursor results you need to loop through your cursor and print values. You need to know column names for what your cursor is returning. You can do something like:
DECLARE
type output_cursor is ref cursor;
P_CURSOR output_cursor;
BEGIN
P_CURSOR := NULL;
DOCTORS_APP.get_reminders ( P_NOTIFICATION_ID => 1975357,P_CURSOR => P_CURSOR) ;
//replace Column1 and Column2 with actual column names
FOR CUR_VAL in P_CURSOR LOOP
DBMS_OUTPUT.PUT_LINE(CUR_VAL.Column1||' '||CUR_VAL.Column2);
END LOOP;
END;