The last time I visited Qatar (in March) I did not have a Visa attached to my Passport (There is no Embassy of Qatar here) and the Visa was stamped at the Air Port. I think this time also the procedure would be the same.
I understand that there is no need for me to bring a Laptop.
As for Medicine, I was refering to things like Paracitamol, Piriton etc which we can buy here without a precription. Do you have any restrictions at the airport for such items?
If I bring in any Herbal Medicine, how can I convince the Customs people as to the genuineness of such things if they confront me? Are they capable of identifying such things?