Yeast infection and menstruation: treatment before and after the cycle

Vulvovaginal candidiasis (VVC, "thrush") is most often caused by Candida albicans and often flares up during the luteal phase and premenstrual period. Hormonal fluctuations, changes in pH, and vaginal microbiota create conditions conducive to the growth of yeast-like fungi, leading some patients to experience "cyclical" flare-ups of symptoms around menstruation. Proper treatment strategies take into account the timing of the cycle and menstrual planning. [1]

The basic principles are the same: confirmation of the diagnosis by clinical examination and, if possible, microscopy/culture, choice of an azole drug (topical or systemic) in an uncomplicated episode, and specific approaches for relapses, severe disease, and non-albicans Candida. International guidelines (CDC/IDSA) remain the basis of the standard. [2]

Epidemiology

Uncomplicated VVC is one of the most common reasons for gynecological visits; most women will experience at least one episode during their lifetime. Up to 5-9% experience recurrent VVC (≥3-4 episodes/year), with some recurrences coinciding with the premenstrual period. [3]

Diagnostics: What is important specifically for “cyclical” complaints

At the patient's bedside, minimum: examination, pH, microscopy of native/KOH preparations; in case of atypia and relapses, culture with identification of the species and susceptibility. For a severe episode, a fluconazole "pulse" is acceptable (days 1-4-7). If non-albicans Candida (e.g., C. glabrata) is suspected, alternative regimens (long-term topical azoles, boric acid) are immediately considered. [4]

Treatment: before, during and after menstruation

1) Before menstruation (at the first symptoms / to prevent outbreaks)

If this is a one-time, mild episode, short topical courses (1-3 days) of imidazoles (clotrimazole, miconazole) or fluconazole 150 mg as a single dose can be used. The choice depends on preference and contraindications. Initiate therapy at the first premenstrual symptoms. [5]

If relapses occur cyclically. Options: (a) standard induction (fluconazole 150 mg on days 1-4-7) followed by a suppressive regimen of 150 mg once a week for 6 months; (b) interval topical regimens in the luteal phase (e.g., 1-2 times a week) when oral azoles are undesirable. The efficacy of weekly suppression has been confirmed by RCT/meta-analyses. [6]

New drugs for relapses.

• Oteseconazole (VIVJOA): Prophylaxis of RVVC in women of non-reproductive potential; regimens include fluconazole induction and oteseconazole maintenance. Not used in women of childbearing potential. [7]
• Ibrexafemme: An oral eukinidine fungicide; approved for the treatment of VVC and reduction of the incidence of RVVC (monthly doses in studies). Contraindicated in pregnancy; pregnancy must be excluded before starting and before each dose of prophylaxis.[8]

If menstruation is expected in 1-3 days, it is acceptable to start with oral fluconazole (irrespective of flow) or choose a single-dose bioadhesive butoconazole 2% (Gynazole-1) - a single dose. Topical multi-day courses can be postponed until the postmenstrual period if symptoms are minimal. [9]

2) During menstruation (there is active discharge)

Can treatment be administered during menstruation? Yes. Both oral and most intravaginal azoles can be used during menstruation. Tampons and menstrual cups should not be used during treatment, as they reduce the effectiveness (they absorb the medication). Use sanitary pads. [10]

Practical options:

• oral fluconazole 150 mg once (or "pulse" in severe cases);
• single-dose topical forms (butoconazole 2% bioadhesive; tioconazole 6.5% ointment single use);
• Multi-day creams/suppositories are allowed during menstruation, but pads are required and tampons are prohibited.[11]

Important information about barrier contraception. Non-fluorinated azole creams/suppositories contain fatty bases and damage latex/rubber; condoms/diaphragms may lose effectiveness within ~72 hours. If sex is unavoidable, use polyurethane/polyisoprene or abstain until the end of the course. [12]

3) After menstruation (consolidation of the effect and prevention)

Response assessment: If symptoms do not resolve within 3-7 days (for short topical courses) or recur, discuss follow-up (microscopy/culture), exclude non-albicans Candida and resistance. [13]

Relapse plan.

• Induction (10-14 days topical azole or fluconazole 1-4-7), then fluconazole 150 mg weekly for 6 months; if oral regimen is not possible, intermittent topical azoles 1-2 times/week for 6 months. [14]
• For non-albicans and/or incomplete response: boric acid 600 mg intravaginally daily for 14-21 days (not pregnant); alternatives: topical nystatin, 17% flucytosine ± 3% amphotericin B (compound). [15]
• Consider oteseconazole (if not of reproductive potential) or ibrexafungerp (with strict contraception and a negative pregnancy test) to reduce the incidence of RVVC.[16]

Table 1. What to choose depending on the moment of the cycle

Situation	First line	Alternatives/Notes
2-5 days before menstruation, a typical mild episode	Fluconazole 150 mg once daily or topical azole for 1-3 days	In case of frequent premenstrual outbreaks - induction 1-4-7 → suppression weekly for 6 months; luteal "prophylactic" local courses are acceptable. [17]
Menstruation has already started	Fluconazole 150 mg 1 time	Single-dose butoconazole 2% or tioconazole; no tampons/cups; pads. [18]
After menstruation, incomplete answer	Re-evaluation + culture/species	For non-albicans - boric acid 600 mg x 14-21 days; nystatin locally. [19]
RVVK (≥3-4/year), no plans for pregnancy	Induction → fluconazole 150 mg weekly for 6 months	Oteseconasol (only without reproductive potential) or ibrexafungerp (strict contraception). [20]

Special scenarios and warnings

Pregnancy. Only topical azoles are recommended for 7 days. Oral fluconazole and ibrexafungerp are contraindicated/not recommended due to risks to the fetus. Boric acid should not be used during pregnancy. [21]

Severe course (swelling, cracks, severe pain). Fluconazole 150 mg every 72 hours × 2-3 doses or 7-14 days of topical azoles, then switch to maintenance therapy in case of relapses. [22]

Antibiotics/triggers. The risk of VVC is higher with systemic antibiotics; some guidelines allow prophylactic fluconazole 150 mg (subject to prior consultation). Avoid douching and harsh intimate cosmetics. [23]

Contraception and sex while using topical azoles. Creams/suppositories may damage latex (condoms/diaphragms) for up to 72 hours; abstinence or use of alternative (polyurethane/polyisoprene) methods is recommended. [24]

Table 2. Common mistakes and how to avoid them

Error	What is dangerous?	What is the correct way?
Postpone treatment until the end of menstruation if symptoms are severe	Increased pain/itching, risk of eczematization	Treat immediately; oral fluconazole or single-dose topical forms; no tampons. [25]
Use tampons during local therapy	Adsorption of the drug, decreased effectiveness	Only pads/diapers for the duration of the course. [26]
Relying on a latex condom when using topical azoles	Reducing barrier reliability to 72 hours	Abstinence or latex-free condoms.[27]
Ignore relapses "in a cycle"	Chronic non-albicans	Induction → 6-month suppression; consider BA/new agents. [28]

Prevention

Primary: avoid douching and scented intimate cosmetics, wear cotton underwear, change menstrual pads/cups frequently, minimize irritants; if taking antibiotics, discuss prophylaxis. Barrier protection reduces the risk of STIs, but be aware of compatibility with topical azoles. [29]

Secondary (in case of RVVC): individualized plan with long-term suppression (oral or intermittent topical), monitoring of Candida species, exclusion of diabetes/immune disorders; in patients without reproductive potential - discussion of oteseconazole; in case of resistance/non-albicans - boric acid or nystatin according to guidelines. [30]

Forecast

Most uncomplicated episodes resolve within 1-3 days with short courses of azoles; choosing the correct dosage form based on the cycle phase accelerates symptom relief. If the instructions are followed (no tampons, no sex, complete course), the rate of early relapses is lower. [31]

In RVVC, long-term suppression significantly reduces the number of exacerbations, but does not always provide a permanent cure. Selecting a maintenance regimen (weekly fluconazole, interval topical courses, new medications) and correcting triggers provide high symptom control. [32]

FAQ

• Is it possible to treat thrush if your period has already started?

Yes. Oral regimens and most intravaginal azoles are acceptable. During topical therapy, use pads; do not use tampons/cups. [33]

• What should I choose if my period starts tomorrow?

Oral fluconazole 150 mg or single-dose butoconazole 2%. Multi-day creams can be transferred to after menstruation if symptoms are mild.[34]

• How to treat frequent outbreaks just before menstruation?

Induction (fluconazole 1-4-7 or 7-14 days topical) → suppression (fluconazole 150 mg weekly for 6 months) or interval topical regimens in the luteal phase. Consider oteseconazole/ibrexate if indicated. [35]

• Is it dangerous to use condoms while using creams/suppositories?

Many azole bases weaken latex for 72 hours. Best to avoid or choose polyurethane/polyisoprene. [36]

• When is boric acid needed?

For non-albicans or azole-resistant Candida: 600 mg intravaginally daily for 14–21 days (not pregnant). [37]