does taking 4 pills of diane 35 then 2 pills after...

can you use diane pills as emergency pills ?
yes 
how to take them ?
4 pills at first dose 
4 pills at second dose after 12 hours for first dose 
- doses should be taken within first 5 days after sexual intercourse 
dose it work ?
yes it do , and its as effective as emergency pills , as its mainly depends on hormonal change that occur after taking them which prevent pregnancy 
possible side effects in this case :
main side effect is periods changes and irrgularties , other side effects are :
1. stomach pain 
2. vomiting 
3. diarrhea 
4. breast pain
5. dizziness
6. headache