| Value | Category | 
                                    
                    
                        | 1 | Indefinitely | 
                                    
                    
                        | 2 | 3 days | 
                                    
                    
                        | 3 | The tablets should only be used with a doctor?s prescription | 
                                    
                    
                        | 4 | Not specified | 
                                    
                    
                        | 5 | No answer | 
                                    
                    
                        | 99 |  | 
                                    
                    
                        | Sysmiss |  | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.