İs it true antibiotic shots are more powerful than pills?

I heard that there are no difference between antibiotics shots and pills on internet. they seem to be equally effective. but I have chronic sinusitis that have not responded to any kind of pills so far. but my doctor said that rocephin will work on me. I have needle fear. should I try rocephin injection?
İs it true antibiotic shots are more powerful than pills?
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