Yes prophylactic antibiotics will not be appropriate when the patient is on concurrent immunosuppressive drugs.
More about prophylactic antibiotics:
Antibiotics used prophylactically are those you take to stave off infection. While you have an illness, you often take antibiotics. In some circumstances where there is a high danger of illness, your doctor may prescribe antibiotics in advance to stave off illness.
The majority of the time, those who may benefit from prophylactic antibiotics have conditions that make them more susceptible to contamination during operation than the general public. These include being extremely young or old, not eating well, being obese or diabetic.
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