If I happen to develop most of the swine flu symptoms mentioned on this site, can I take Tamiflu without Doctor's prescription?? Is it perfectly safe to take this medicine without doctor's advise.

Never do that !!!

Never take Tamiflu without your doctor's prescription. Your doctor will advise you Tamiflu if you really need it. If taken without the real need of it, Tamiflu might not work the second time around if a scenario arises when you really need it.

Moreover, your doctor will advise you a dosage of Tamiflu only after discussing with you whether you are allergic to the components of Tamiflu and after assessing your medical condition in order to avoid any serious side effects of the medication.

So it's advisable to consult your doctor for such matter.