What is fosfomycin?
Fosfomycin is an antibiotic that fights infection caused by bacteria.
Fosfomycin is used to treat bladder infections.
Fosfomycin may also be used for purposes not listed in this medication guide.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
Before taking this medicine
You should not use fosfomycin if you are allergic to it.
FDA pregnancy category B. Fosfomycin is not expected to harm an unborn baby. Tell your doctor if you are pregnant.
It is not known whether fosfomycin passes into breast milk or if it could harm a nursing baby. You should not breast-feed while using fosfomycin.
Fosfomycin should not be given to a child younger than 12 years old.
Do not share this medicine with another person, even if they have the same symptoms you have.
How should I take fosfomycin?
Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Fosfomycin is usually given in only one dose. Do not take more than a single dose unless your doctor tells you to.
You may take fosfomycin with or without food.
Fosfomycin is a powder medicine that must be mixed with water before using it. Do not take the dry powder without adding water.
Dissolve the powder in 3 to 4 ounces (1/2 cup) of cold water. Stir this mixture and drink all of it right away. To make sure you get the entire dose, add a little more water to the same glass, swirl gently and drink right away.
Do not mix fosfomycin oral powder with hot water.
It may take 2 or 3 days before your symptoms improve.
Call your doctor if your symptoms do not improve within 3 days after treatment, or if you have a fever or any other new symptoms.
To be sure fosfomycin is the right antibiotic for the type of infection you have, your urine may need to be tested before and after you take this medicine.
Store at room temperature away from moisture and heat. Keep the powder in its original package until you are ready to mix your dose.
What should I avoid while taking fosfomycin?
Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or bloody, stop taking fosfomycin and call your doctor. Do not use anti-diarrhea medicine unless your doctor tells you to.
Fosfomycin side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
- diarrhea that is watery or bloody; or
- new or worsening bladder symptoms (burning, painful urination).
Common side effects may include:
- nausea, upset stomach, mild diarrhea;
- headache, dizziness;
- sore throat, runny nose;
- back pain; or
- vaginal itching or discharge.
What other drugs will affect fosfomycin?
Other drugs may interact with fosfomycin, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using.