How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Dr. Bob Your Own Question

Dr. Bob
Dr. Bob, Medical Doctor
Category: Urology
Satisfied Customers: 5118
Experience:  20 Years in Internal Medicine, Neurology and Sports Medicine
61817858
Type Your Urology Question Here...
Dr. Bob is online now

Last night (12 hours ago) I met a woman in a bar and we

Customer Question

Last night (12 hours ago) I met a woman in a bar and we ended up having unprotected vaginal sex. I do not know her HIV status. She seemed ok but I know you can't tell just by looking at someone. I have this overwhelming fear that has come over me as I've never done unprotected vaginal sex before, only protected.Should I pursue PEP?
Submitted: 8 days ago.
Category: Urology
Expert:  Shantal-Mod replied 5 days ago.
Hello,
I'm Shantal and I'm a moderator for this topic.
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I was checking to see if you had already found your answer or if you still need assistance from one of the Professionals.
Please let me know if you wish to continue waiting or if you would like for us to close your question?
Thank you,
Shantal
Expert:  Dr. Bob replied 5 days ago.

Hi there. PrEP is recommended when a person is at "substantial risk" of acquiring HIV. The risk from a single event of unprotected vaginal intercourse with a woman who has HIV is only about 1 in 2500. This means you would have to have intercourse about 1250 times with this person for it to be a coin toss. Of course, if the person does not have HIV then you have nothing to worry about except the other STIs out there.

Expert:  Dr. Bob replied 5 days ago.

That said, here are the risk factors for heterosexual sex:

HIV-positive sexual partner

Recent bacterial STI

High number of sex partners

History of inconsistent or no condom use

Commercial sex work

Unprotected sex in high-prevalence area or network

Expert:  Dr. Bob replied 5 days ago.

The best approach here would be to see if your partner from the bar has been tested recently. If negative, this would be very reassuring, though you would still want to get tested yourself at about 2 weeks and 3 months. An HIV antibody response can be detected as early as two weeks in a few people and in more than 99.9% of people by 12 weeks. Testing earlier than 2 weeks is helpful if the test is positive, although it would need to be confirmed. It is not too helpful before 2 weeks if negative (as false negatives are fairly common this early.)

Expert:  Dr. Bob replied 5 days ago.

As for PrEP, your doctor or an HIV specialist might recommend taking it while awaiting testing. This is a judgement call based on all the involved factors. Risks of treatment are very low, so some doctors have a low threshold for prescribing it.

Expert:  Dr. Bob replied 5 days ago.

Let me know if you have any follow up questions about this.

What Customers are Saying:

 
 
 
  • I feel so much better today, and upon further investigation believe that there is a chance that the responses I got saved me FROM a serious, even life threatening situation. I am very grateful to the experts who answered me. Susan O.
< Previous | Next >
  • I feel so much better today, and upon further investigation believe that there is a chance that the responses I got saved me FROM a serious, even life threatening situation. I am very grateful to the experts who answered me. Susan O.
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
 
 
 

Meet The Experts:

 
 
 
  • Dr. Y.

    Dr. Y.

    Urologist

    Satisfied Customers:

    15021
    Specializing in general urology and reconstructive urology.
< Last | Next >
  • http://ww2.justanswer.com/uploads/lyeung1/2010-07-25_032152_tn_IMG_0241.JPG Dr. Y.'s Avatar

    Dr. Y.

    Urologist

    Satisfied Customers:

    15021
    Specializing in general urology and reconstructive urology.
  • http://ww2.justanswer.com/uploads/TH/tharun/2013-12-28_0129_tailoredfitsuits.64x64.jpg Dr. Tharun's Avatar

    Dr. Tharun

    Urology Resident

    Satisfied Customers:

    614
    MBBS, DNB surgery and presently working as Urology resident towards the degree of Urologist.
  • /img/opt/shirt.png Dr. B's Avatar

    Dr. B

    Urologist

    Satisfied Customers:

    62
    Trained in Adult and Pediatric Urology, Fellowship trained in Urologic Oncology.
  • http://ww2.justanswer.com/uploads/FA/FamilyPhysician/2013-8-31_191624_JA550x500Photo.64x64.jpg Family Physician's Avatar

    Family Physician

    Doctor

    Satisfied Customers:

    2418
    GP with over 27 years experience including emergency medicine
  • http://ww2.justanswer.com/uploads/DR/DrK99/newpic2.64x64.jpg Dr. K.'s Avatar

    Dr. K.

    Board Certified MD

    Satisfied Customers:

    274
    Board certified with experience in primary care.
  • http://ww2.justanswer.com/uploads/agketch/2008-7-14_184046_drketchresized.jpg Dr. Ketch's Avatar

    Dr. Ketch

    Board Certified Physician

    Satisfied Customers:

    76
    Medical Degree, Former Assistant Professor at School of Medicine at Yale University