Relagard Drug Interactions: What to Avoid and What to Tell Your Doctor

One of the advantages of Relagard is that it works locally in the vagina with very little absorption into the bloodstream. This means it has a much simpler interaction profile than most oral medications. However, there are still important precautions to be aware of — particularly around other vaginal products, contraceptive devices, and pregnancy.

Why Relagard Has Few Systemic Drug Interactions

Relagard's active ingredients — acetic acid (0.9%) and oxyquinoline (0.025%) — are applied directly to vaginal tissue. Because they are not meaningfully absorbed into the bloodstream, they do not interact with the liver's drug-metabolizing enzymes (cytochrome P450), blood pressure medications, antidepressants, or most other oral medications. It is unlikely that drugs you take by mouth or injection will have any effect on vaginally applied Relagard, and vice versa.

Key Interactions and Precautions to Know

Even though systemic interactions are rare, there are several important local interactions and precautions:

1. Latex Contraceptive Devices (Condoms and Diaphragms)

Vaginal gels — including Relagard — can weaken latex-based contraceptive devices such as condoms, diaphragms, and cervical caps. The acidity and oil-or-glycerin components of vaginal products can degrade latex, potentially reducing their effectiveness as contraceptives and barriers against sexually transmitted infections.

If you use latex condoms or diaphragms, talk to your healthcare provider about timing your Relagard doses to minimize overlap with sexual activity, or about using non-latex alternatives during treatment.

2. Spermicides

Concurrent use of vaginal spermicides with Relagard may alter the local vaginal environment and potentially reduce the effectiveness of one or both products. If you use spermicide-based contraception, discuss timing and compatibility with your healthcare provider.

39,333+ patients found their medications in stock

39K+

Find Relagard In Stock Today →

3. Other Vaginal Products

Using multiple vaginal products simultaneously can interfere with each other's effectiveness and may cause additional irritation. Products to be cautious about combining with Relagard include:

Other vaginal antibiotics or antifungals (if your doctor prescribes both, ask about timing)

Vaginal lubricants or moisturizers (may dilute the gel)

Vaginal hormonal creams (estrogen creams) — check with your provider on spacing

Douches — avoid douching entirely during Relagard treatment, as it can wash away the medication and disrupt pH balance

4. Tampons

Do not use tampons while using Relagard — they can absorb the medication before it has time to work. Use a deodorant-free pad or panty liner instead to protect your clothing from gel leakage.

Skip the calls, skip the stress.

Find Relagard In Stock Today →

50K+

Medications
Found

99%

Success
Rate

6+

Hours saved
on average

5. Allergies to Oxyquinoline or Acetic Acid

If you have a known hypersensitivity to oxyquinoline (or other quinoline-based compounds) or to acetic acid, do not use Relagard. Tell your doctor and pharmacist about any medication allergies before starting treatment. Signs of an allergic reaction include rash, hives, difficulty breathing, or swelling of the face or throat — seek emergency care immediately if these occur.

What to Tell Your Doctor Before Using Relagard

All prescription and over-the-counter medications you currently take

Any vitamins, herbal supplements, or natural products

If you are pregnant, planning to become pregnant, or breastfeeding

Any known drug allergies

What contraceptive methods you use, if any

Any other vaginal products you use regularly

The Bottom Line on Relagard Interactions

Relagard is a low-risk medication from an interaction standpoint. Its primary precautions are local — involving other vaginal products and latex devices — rather than systemic. As long as you follow your provider's instructions and disclose all medications and products you use, using Relagard safely is straightforward. For more on how Relagard affects your body, see our article on Relagard side effects.