When a fever is infused, the infusion is usually not a fever-reducing drug, but a fever-reducing drug can be taken by intramuscular injection or orally. Most of the fevers are due to infections, so most of the infusions are anti-inflammatory drugs. For example, if the fever is caused by a viral infection, the infusion is often Ribavirin or Xiyampin. If the fever is caused by a bacterial infection, the infusion is often antibiotics, such as cephalosporin, ceftriaxone or cefoperazone, and penicillin, like penicillin. There may also be infusions of azithromycin, such as erythromycin, which are effective. Some people have fever caused by diarrhea, and this is often followed by levofloxacin, which also works well. In addition, vitamin infusions are also given when fever occurs to promote the body’s resistance to disease.