STD testing · Medellín
How soon after a possible exposure can I get tested?
Medically reviewed by Dr. María Camila Ramírez, MD, General Practitioner ·
4.9 on Google · 183 reviews
Every infection has a window period: the time between exposure and when a test can reliably detect it. Testing too early can give a negative result even if you are infected. That doesn't mean waiting to see a doctor. If you have symptoms, see a doctor now, and if a possible HIV exposure happened in the last 72 hours, talk to a doctor about PEP today.
HIV exposure in the last 72 hours? PEP has to be started within 72 hours. Don't wait for a test. Message us on WhatsApp or come to our El Poblado clinic, open 24/7.
Typical window periods
| Infection | When most infections show | When a negative result is reliable |
|---|---|---|
| Chlamydia | About 1–2 weeks | 2 weeks |
| Gonorrhea | About 1–2 weeks | 2 weeks |
| Trichomoniasis | 1–4 weeks | 4 weeks |
| Syphilis | About 3–6 weeks | 90 days |
| HIV (our rapid test detects antibodies) | About 3–6 weeks | 90 days |
| Hepatitis B | 1–9 weeks, most about 4 weeks | 12 weeks |
| Hepatitis C | 8–11 weeks | 4-6 months |
| Herpes (blood antibodies) | Can take up to 12–16 weeks | 16 weeks |
What this means in practice
- Less than a week ago: testing now can't rule much out. Speak to a doctor, especially about PEP if it was a possible HIV exposure, and plan a test at 2 weeks.
- 2–6 weeks ago: a complete rapid panel picks up most chlamydia, gonorrhea and trichomoniasis. Your doctor will likely suggest repeating the blood tests at 12 weeks.
- 3 months or more: a complete rapid panel gives you a reliable picture for most infections.
Testing more than once
Many people test twice: once soon after the exposure, then again at 12 weeks. Your doctor gives you a date for your follow-up test, and follow-up visits are free.
Symptoms change the plan
If you notice discharge, burning when you urinate, sores, a rash or pelvic pain, don't wait for the window period. Book a doctor visit now. Your doctor examines you and orders the right tests.
Get tested in Medellín
Walk in to our El Poblado clinic between 9 am and 5 pm, book online, or have an English-speaking doctor come to your hotel or home for an extra US$200.
Get tested today in Medellín
Walk in to our El Poblado clinic 9 am to 5 pm, book online, or have an English-speaking doctor come to you.