What are vaginal pH modulators?

Vaginal pH modulators are prescription vaginal gels that maintain an acidic vaginal pH to reduce sperm motility and prevent pregnancy.

How effective are vaginal pH modulators?

With typical use, the gel was 86.3% effective over 7 cycles in its Phase 3 clinical trial; the trial did not report a perfect-use rate.

Do pH gels protect against STIs?

No. Vaginal pH modulators do not protect against STIs.

How do you use vaginal pH modulator gel?

Insert it into the vagina with a pre-filled applicator up to 1 hour before each act of vaginal sex.

Non-Hormonal Vaginal pH Modulators

Q: Do pH gels require a prescription?

Yes. The gel requires a prescription, which you can get through telehealth or a local clinician.

Method at a Glance

Effectiveness

86 out of 100 people successfully prevent pregnancy in a year.

Typical use effectiveness rate.

DurationSingle use (effective for 1 hour)

Cost$0–$400

/per package

ReversibilityReversible

STI ProtectionNo

How you get itTelehealth Prescription

How it works

Vaginal pH modulators are prescription gels that keep the vagina acidic enough to disable sperm. The available FDA-approved gel contains lactic acid, citric acid, and potassium bitartrate. You insert it with a pre-filled applicator up to one hour before each act of vaginal sex, and each act needs its own dose — it is not effective if applied after sex. It lowers pH, reduces sperm motility, and forms a physical barrier.

Research and approval status

One FDA-approved vaginal pH modulator is available. In the AMPOWER Phase 3 trial, it was 86.3% effective with typical use over seven cycles. The primary publication does not report perfect-use efficacy. It does not protect against STIs.

Where to get it

You need a prescription, which you can get through telehealth or a local clinician. You use the gel on demand, so there is no daily routine. Some users report vaginal burning or an increased risk of urinary tract infections. Check our provider directory for clinics near you that prescribe this gel.

Vaginal pH Modulator

Method at a Glance

1 product in this category

PHEXX Vaginal Gel

371 providers in this category

Planned Parenthood - Albany Health Center

Planned Parenthood - Alhambra Health Center

Planned Parenthood - Allentown Health Center

Planned Parenthood - Anchorage Health Center

What the evidence says

How well it works

Cost & insurance

Duration & reversibility

The science

Regulatory status & access

Side effects

Who shouldn't use this

Clinical guidelines