Observing fever and Not taking medicine? I have been trying to tie mind with breathe lately and successful several times through the day.

But today I have fever, and I am finding it very difficult to observe, I just want to this feeling of weakness to be over, I know it is not permanent, But yes one more thing i realized today, the importance of healthy body, My friend suggested me not to take medicine as it is also my Sankara (to me its very stupid.)

He also explained that human body raises it temperature to kill some bacteria and by taking medicine you will stop its process.

Should I not take medicine in fever and just observe what is happening inside.

I want to keep following the Shila's and not also get rid of fever.
Kucchivikara-vatthu includes,

A sick person endowed with five qualities is hard to tend to: he does what is not amenable to his cure; he does not know the proper amount in things amenable to his cure; he does not take his medicine; he does not tell his symptoms, as they actually are present, to the nurse desiring his welfare, saying that they are worse when they are worse, improving when they are improving, or remaining the same when they are remaining the same; and he is not the type who can endure bodily feelings that are painful, fierce, sharp, wracking, repellent, disagreeable, life-threatening. A sick person endowed with these five qualities is hard to tend to.
A sick person endowed with five qualities is easy to tend to: he does what is amenable to his cure; he knows the proper amount in things amenable to his cure; he takes his medicine; he tells his symptoms, as they actually are present, to the nurse desiring his welfare, saying that they are worse when they are worse, improving when they are improving, or remaining the same when they are remaining the same; and he is the type who can endure bodily feelings that are painful, fierce, sharp, wracking, repellent, disagreeable, life-threatening. A sick person endowed with these five qualities is easy to tend to.
A nurse endowed with five qualities is not fit to tend to the sick: He is not competent at mixing medicine; he does not know what is amenable or unamenable to the patient's cure, bringing to the patient things that are unamenable and taking away things that are amenable; etc.