Duratia 60 mg (dapoxetine) is usually taken with or without food, so it can be taken on an empty stomach if that suits you. It is used for premature ***** (PE) and is generally taken 1–3 hours before ***** activity (as prescribed).

If taking it on an empty stomach:

Take it with a full glass of water.
Be aware that some people may feel nausea, dizziness, or light-headedness, and these effects can sometimes be more noticeable without food.
Avoid or limit alcohol, because it can increase the risk of dizziness or fainting.
Do not take Duratia 60 mg if you use certain medicines (for example, MAO inhibitors, some antidepressants, or other interacting medicines) unless your doctor has advised it.

If you mean “where” as in which body area or “when” to take it during fasting, please clarify.