Free PrEP and Doxy-PEP Online in 2026: Combined Sexual Health Coverage

Why combine PrEP and doxy-PEP?

Here's the honest answer: if you're at risk for HIV, you're usually also at risk for bacterial STIs. The same sexual practices that create HIV exposure risk — condomless oral, anal, or vaginal sex — also create exposure risk for chlamydia, syphilis, and gonorrhea. PrEP is extraordinarily effective at preventing HIV (>99% with adherence), but it does nothing for bacterial STIs.

In practice, many PrEP users contract bacterial STIs at high rates. Rates of chlamydia, syphilis, and gonorrhea among PrEP users are significantly higher than in the general population — not because PrEP causes STIs, but because the demographic using PrEP is by definition at elevated STI exposure risk.

Doxy-PEP fills that gap. A single 200mg dose of doxycycline within 72 hours after sex prevents roughly 88% of chlamydia infections and 87% of syphilis infections in the CDC-endorsed populations (men who have sex with men and transgender women). Combined with PrEP, it creates comprehensive bacterial + viral STI prevention that no single intervention achieves alone.

What each one does

Prevention tool	What it prevents	Dosing
PrEP (Truvada/generic, Descovy)	HIV (>99% effective with adherence)	One pill daily
PrEP injectable (Apretude)	HIV (>99% effective)	Injection every 2 months
PrEP injectable (Yeztugo)	HIV (>96% effective)	Injection every 6 months
Doxy-PEP (doxycycline)	Chlamydia (~88%), syphilis (~87%), some gonorrhea (~55%)	200mg within 72 hrs after sex

PrEP is ongoing/continuous protection. Doxy-PEP is event-driven (only take after exposure). They don't interact and can be used together without issue.

Who should consider combined PrEP + doxy-PEP

The CDC's 2024 doxy-PEP guidelines specifically endorse doxy-PEP for:

• Cisgender men who have sex with men (MSM) who've had a bacterial STI in the past 12 months
• Transgender women who've had a bacterial STI in the past 12 months

For people meeting PrEP indications who also fall into these categories — which is a substantial overlap — combined PrEP + doxy-PEP is often the right approach. Many MSM and transgender women who use PrEP contract bacterial STIs at rates high enough that the doxy-PEP's benefits clearly outweigh the antimicrobial resistance concerns.

For people using PrEP who don't meet the CDC's doxy-PEP criteria (cisgender women, for example), the doxy-PEP evidence base is mixed and the calculation is more individual. Talk to a provider about whether it makes sense in your specific situation.

How combined access works through MISTR

MISTR's platform is built to handle the full sexual health picture in one place — PrEP, PEP, doxy-PEP, STI testing and treatment, and follow-up care. From the patient's perspective, here's what combining PrEP and doxy-PEP looks like:

One intake, one provider

You fill out a single medical intake covering your sexual health history, current medications, and health background. A licensed provider reviews it once. If both PrEP and doxy-PEP are appropriate, the provider prescribes both from the same consultation — no duplicate evaluations, no separate appointments.

One set of baseline labs

The labs needed before starting PrEP (HIV test, kidney function, hepatitis B/C, STI screening) are the same labs a provider wants before recommending doxy-PEP. Completing them once covers both. At-home self-collection kits or local lab visits work for both.

One delivery, two medications

Your PrEP medication and doxy-PEP prescription both ship to your home in discreet packaging. Typically, PrEP arrives as a 90-day supply with auto-refill; doxy-PEP arrives as a supply of doxycycline tablets to have on hand for event-driven use.

Integrated follow-up

Quarterly follow-ups (HIV test, kidney function, STI screening) cover both protocols. Your provider can adjust either prescription based on labs or side effects. STI screening happens routinely — if chlamydia, gonorrhea, or syphilis is detected, treatment is coordinated through the same platform.

What does combined PrEP + doxy-PEP cost?

For most patients using MISTR or similar 340B-partnered telehealth platforms: $0. This includes:

Component	Typical cost through telehealth
Consultation (both prescriptions)	$0
Baseline labs	$0
PrEP medication (generic TDF/FTC, 90-day supply)	$0
Doxy-PEP (doxycycline supply)	$0
Quarterly follow-up labs	$0
Total	$0

This is made possible by a combination of federal 340B drug pricing, insurance reimbursement where applicable, and generic pricing for doxycycline (which is cheap even at full cash price — typically $10–$30 for a supply). Even if cost isn't fully absorbed for a given patient, out-of-pocket cost is usually minimal.

If you're paying for each of these services separately at different providers, the costs add up fast: ~$30/month for cash-pay generic PrEP, $50–$200+ per office visit, $200+ for labs, $30+ for doxy-PEP. The bundled telehealth approach eliminates most of that friction.

Step-by-step: signing up for combined PrEP + doxy-PEP

Step 1: Start MISTR signup (~5 minutes)

Go to heymistr.com and create an account. Enter referral code ANDR735 when prompted. Basic demographic and contact info.

Step 2: Medical intake (~10 minutes)

This is where you indicate you want PrEP and doxy-PEP. The intake asks about sexual health history, recent STI history (the 12-month STI history is directly relevant to doxy-PEP eligibility under CDC guidelines), medications, and health background. Be honest — accurate answers help the provider make appropriate recommendations.

Step 3: Baseline labs (3–5 days)

At-home self-collection kit or local lab visit. One set of labs covers both protocols.

Step 4: Provider review (24–48 hours)

The provider reviews everything. If both PrEP and doxy-PEP are appropriate, they prescribe both. You may have a quick video consultation if the provider wants to discuss anything further.

Step 5: Medications ship (3–7 days)

Both medications arrive in discreet packaging. PrEP as a 90-day supply; doxycycline as an event-driven supply.

Step 6: Ongoing care (every 3 months)

Quarterly labs and medication refills. PrEP ships automatically; doxycycline can be refilled as needed based on your pattern of use.

Practical tips for using PrEP + doxy-PEP together

• PrEP adherence first. PrEP only works with consistent daily dosing (or on-schedule injections). Make that the foundation. Doxy-PEP is an addition, not a replacement.
• Keep doxy-PEP on hand. The 72-hour window means you need doxycycline available when you need it. Most patients keep a supply at home; some also keep a small supply in a travel bag or at a partner's place.
• Take doxy-PEP with food and water. Stomach upset is the most common side effect. Taking with food and staying upright for 30 minutes after helps.
• Don't exceed 200mg per 24 hours. The CDC protocol is one 200mg dose per 24-hour period, regardless of number of sexual encounters.
• Continue STI testing. Doxy-PEP isn't 100% effective. Quarterly STI screening (which your PrEP protocol already includes) remains important.
• Watch for antibiotic-related issues. Report any unusual symptoms — severe GI issues, rashes, yeast infections — to your provider.
• Condoms still reduce risk. When practical, condoms add a layer of protection that neither PrEP nor doxy-PEP provides (HPV, certain viral STIs, doxy-resistant gonorrhea).

Beyond PrEP + doxy-PEP: comprehensive sexual health

For maximum protection, consider layering additional tools:

Frequently asked questions