Any side effect off vigrx for man

vigrx side effects :
1. headache 
2. muscles pain
3. diarrhea
4. facial flushing 
5. nasal congestion 
6. heartburn
General advices :
1. consult your doctor before taking this medication
2. you are not allowed to take more than 1 pill daily 
3. take the medication half an hour before your planned sexual intercourse 
4. if you are diabeties or DM patient you should be cautious with using such a medications 
5. in case of severe side effects , consult your doctor as soon as possible