Spermicide

How it works

Nonoxynol-9 disrupts the sperm cell membrane. Sperm movement slows or stops. The chance of sperm reaching the cervix decreases. The effect is short-lived. It must be reapplied for every act of sex. Its effect ends as soon as it is gone. Fertility is not affected. Spermicide does not protect against STIs. With frequent use, it may increase the risk of HIV transmission.

Forms

• Gel or cream: Used together with a diaphragm or cervical cap.
• Foam: Squirted into the vagina with an applicator.
• Film: A thin sheet that dissolves. Inserted 15 minutes before sex.
• Suppository: A tablet that dissolves. Inserted 10–15 minutes before sex.

At SoftCare, which form suits you is discussed based on your preference. Using it on its own is not recommended.

Who it is suitable for

• Those using a diaphragm or cervical cap
• Those who want extra protection in addition to condoms
• Those who do not want to use hormones and are looking for an extra method used only during sex

Situations that need care:

• Allergy to nonoxynol-9
• Frequent sex (more than once a day) — irritation and HIV risk increase
• Sex with a high HIV risk
• History of vaginal irritation or infection
• Anal sex (rectal use is not recommended)

The CDC and WHO advise against using nonoxynol-9 for HIV prevention. Frequent use is linked to increased risk.

How to apply it

• Wash your hands.
• Place the product deep in the vagina.
• Gel and foam work immediately.
• Wait 10–15 minutes for film and suppositories to dissolve.
• Apply before sex. If more than 1 hour passes, apply again.
• A new dose is needed for every act of sex.
• Do not douche for 6 hours after sex.

Dose and waiting time vary by product type. Read the package insert. At SoftCare, application instructions are given in writing.

Effectiveness

Used alone:

• Perfect use: about 18% pregnancy (first year)
• Typical use: about 21–28% pregnancy (first year)

Together with a diaphragm or cervical cap:

• Perfect use: about 6% pregnancy
• Typical use: about 12–17% pregnancy

Together with a condom:

• A condom alone, with typical use: about 13% pregnancy.
• Adding spermicide may slightly lower the pregnancy risk but does not increase STI protection.
• Spermicide-coated condoms show no meaningful advantage over regular condoms.

Spermicide alone is one of the least effective methods. At SoftCare, using it on its own is not recommended.

Side effects

Common:

• Vaginal burning or itching
• Increased discharge
• Penile irritation
• Increased risk of urinary tract infection

Rare risks:

• Allergic reaction
• Damage to the vaginal lining with frequent use
• Increased risk of HIV and other STI transmission (with use more than once a day)

If irritation occurs, stop using the product. If it continues, another method is discussed. If you have fever, a rash or severe burning, seek urgent care.

HIV and STI risk

Nonoxynol-9 does not prevent HIV. Meta-analyses have shown that it does not reduce HIV risk. Frequent use is linked to more genital lesions. These lesions can make HIV transmission easier. The risk is higher with anal sex. At SoftCare, spermicide is not recommended for patients at high risk of HIV. Condoms and regular testing are discussed.

Use with a diaphragm or cervical cap

A diaphragm or cervical cap is not enough without spermicide. It is spread inside the dome and around the rim. A new dose is applied for each additional act of sex. The cap or diaphragm is not removed. It is taken out after 6 hours. At SoftCare, you are taught how to use this combination.

How it differs from the gold IUD and other methods

At SoftCare, the gold IUD is our first choice. Spermicide may be discussed in these situations:

• A patient using a diaphragm or cervical cap
• A patient who wants extra protection in addition to condoms
• If use on its own is planned, its low effectiveness is clearly explained

The gold IUD carries no risk of forgetting and is much more effective. Condoms protect against STIs. Spermicide is only an additional barrier. It does not protect against STIs and may increase risk with frequent use. The decision is based on frequency of sex, HIV risk and ability to use it consistently.

Follow-up

• Application training at first use
• Assessment if there is irritation or infection
• STI testing if there is a risk
• If it continues to be used on its own, a more effective method is discussed

At SoftCare, patients starting spermicide receive written application and risk information.

Our approach at SoftCare

At SoftCare Clinic, assessment for spermicide starts with your gynecological history and STI risk. The gold IUD is our first recommendation. Spermicide is discussed as an addition to a diaphragm, cervical cap or condom. Using it on its own is not recommended. You are taught how to apply it. It is not used in patients at high risk of HIV. If there is irritation or infection, another method is recommended. If there is an STI risk, condoms and testing are recommended.

Appointments: +90 212 241 30 10 · softcareclinic.com

References

• 1. Centers for Disease Control and Prevention (CDC). U.S. Medical Eligibility Criteria for Contraceptive Use, 2024.
• 2. Cleveland Clinic. Spermicide.
• 3. Planned Parenthood. Spermicide disadvantages.
• 4. Wilkinson D, et al. Nonoxynol-9 for prevention of vaginally acquired HIV and other STIs: systematic review. Lancet Infect Dis. 2002.
• 5. Trussell J. Contraceptive failure in the United States. Contraception. 2011;83(5):397–404.
• 6. World Health Organization (WHO). Medical eligibility criteria for contraceptive use.
• 7. T.C. Sağlık Bakanlığı. Gebeliği Önleyici Yöntemler.
• Note: Effectiveness rates and HIV risk are updated by the physician in line with current guidelines. At SoftCare, the gold IUD is our first choice; spermicide is not recommended on its own and is discussed in selected combinations. This reference list is for information purposes.

A citation does not mean that SoftCare wrote that text.

Medically reviewed by Op. Dr. Şükrü Sanus, Obstetrician & Gynecologist · Last medical review: 2 October 2026