If she underwent a bypass surgery  9 months ago then she should be seen by the Cardiologist. She is not a case for self medication.

Kindly consult with procto app

Need few more details Kindly consult

Can help you with the next course of action and treatment plan. Would like to discuss in details and provide apt solution. Kindly consult.

connect with a call for details discussion regarding the disease and it's management

Can help you, kindly consult and provide detailed history for proper diagnosis and further management

Ask her cardiologist

It maybe viral,but the dose of paracetamol or frequency may not be enough.

Kindly consult for detailed evaluation and treatment

You need to get some tests done to diagnose it's viral or bacterial

If it is viral fever, there is no role of antibiotic. Antibiotic don't kill virus.  However,  in any case if acute febrile illness,  the standard protocol is to take Paracetamol,  and symptom based treatment initially.  If fever is persistent for more than 5 days , need to do evaluation by clinical examination,  investigations as per  detailed history and examination findings. Based on the report,  next course of action  is decided.

Yes she can.

She can take tab zifi 200 mg twice for 3 days