Generic name: secnidazole [ sek-NID-a-zole ]
Drug classes: Amebicides, Miscellaneous antibiotics

Medically reviewed by Judith Stewart, BPharm. Last updated on Jul 17, 2024.

What is Solosec?

Solosec is an antimicrobial agent that fights bacteria.

Solosec is a prescription medicine used in women to treat bacterial vaginal infections.

Solosec is also used to treat trichomoniasis, a common sexually transmitted infection (STI), in adults. Sexual partners should be treated at the same time. People should avoid having sex until they and their sex partners are treated (for example, when therapy has been completed and any symptoms have resolved) to help prevent reinfection.

Secnidazole will not treat fungal (yeast) infections.

Warnings

You should not breast-feed while using Solosec and for at least 4 days after your last dose.

Before taking this medicine

You should not use Solosec if you are allergic to secnidazole or similar medicines such as benznidazole, metronidazole (Flagyl), or tinidazole (Tindamax).

It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant.

You should not breast-feed while using this medicine and for at least 4 days after your last dose.

Solosec is not approved for use by anyone younger than 12 years old.

How should I take Solosec?

Take Solosec exactly as it was prescribed for you. Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Solosec is taken in a single dose of one packet of oral granules.

You may take this medicine with or without food.

To use the oral granules: Open the packet and sprinkle the powder into a spoonful of pudding, yogurt, or applesauce. Swallow the mixture right away without chewing. Do not save it for later use.

Drink a full glass of water after swallowing the oral granule mixture.

Do not dissolve the oral granules in any type of liquid.

Store the packet at room temperature until you are ready to take the medicine. Protect from moisture and heat.

Dosing information

Usual Adult Dose for Bacterial Vaginosis:

2 g orally once

Use: For the treatment of bacterial vaginosis in female patients

Usual Adult Dose for Trichomoniasis:

2 g orally once

Comments:
-Sexual partners of infected patients should be treated with the same dose at the same time to prevent reinfection as trichomoniasis is a sexually transmitted disease with potentially serious sequelae.

Use: For the treatment of trichomoniasis due to Trichomonas vaginalis

Usual Pediatric Dose for Bacterial Vaginosis:

12 years or older: 2 g orally once

Use: For the treatment of bacterial vaginosis in female patients

Usual Pediatric Dose for Trichomoniasis:

12 years or older: 2 g orally once

Comments:
-Sexual partners of infected patients should be treated with the same dose at the same time to prevent reinfection as trichomoniasis is a sexually transmitted disease with potentially serious sequelae.

Use: For the treatment of trichomoniasis due to T vaginalis

What happens if I miss a dose?

Since Solosec is used as a single dose, it does not have a daily dosing schedule.

What happens if I overdose?

An overdose of Solosec is unlikely to occur.

What to avoid

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

Solosec side effects

Get emergency medical help if you have signs of an allergic reaction to Solosec: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

You may develop a vaginal yeast infection while taking this medicine. Call your doctor at once if you have:

• vaginal itching or burning;

• redness or swelling; or

• white or yellow vaginal discharge (may be odorless).

Common Solosec side effects may include:

• nausea, vomiting, diarrhea, stomach pain;

• headache; or

• a bitter or metallic taste in your mouth.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Related/similar drugs

What other drugs will affect Solosec?

Other drugs may interact with secnidazole, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.

Popular FAQ

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Solosec only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Medical Disclaimer

Copyright 1996-2025 Cerner Multum, Inc. Version: 1.01.