Why you should not share medicines to people who have the same symptoms.

Because people may have the same symptoms, but that does not mean that the symptoms caused by the same or can be caused by different pathogens.
Treatment, it must vary as the patient has been diagnosed with infectious respiratory tract on by this disease usually have fever, cough, sore throat, throat inflammation runny like them, but the cause of the disease may be different.
Caused by bacteria, not exceeding 15 per cent need to get antibiotics, but 85 percent is not caused by bacteria. Itself can be cured without antibiotics. The receiving antibiotics or drugs that are not necessary, also had no effect on the healing of the disease more quickly and also cause dangerous side effects of drugs from such well.
So you can see that The same symptoms do not need to be treated the same, so we do not share drugs with friends because it may cause allergic and drug treatment that can not be. Drug users who share that others are not full of drugs may cause chronic disease.