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Question: With the exception to Viral related STDs. Does the application of Neosporin on a man’s penis with specific placement at the opening of the urethra act as a chemical barrier against bacteria related STDs during Vaginal/Penile intercourse? Please don’t answer the question with simply replying, “Use Condoms”.
It is not 100 percent
Detailed Answer:
Hello and welcome to Ask A Doctor service.
I have reviewed your query and here is my advice.
Using an antibiotic cream at opening of urethra as chemical barrier against bacterial STDs.
It will always be less than 100% for many reasons like:
- The cream will get washed away during the sexual intercourse and increases the likelihood of STDs.
- STDs like gonorhea usually attach to urethral inner lining and spread quickly. These may also attach to skin of penis and result in infection. Therefore the protection offered is not 100%.
- Quickly developing resistance among bacteria.
- Neosporin may not have efficacy against all bacteria.
- User will have the doubt of getting infected.
- Such a use of neosporin is not supported by research
Hope it helps. Let me know if I can assist you further.
Dr Vaishalee

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