Dificid is an antibiotic manufactured by Optimer Pharmaceuticals. It contains fidaxomicin as its main active ingredient. It belongs to macrolide antibiotic group of drugs. It acts by killing sensitive bacteria. It is used for treatment of diarrhea caused by Clostridium difficile. Infection of this bacterium could cause severe diarrhea, which could be fatal.

Dificid should be taken for the full course prescribed. Symptoms of Clostridium difficile infection may improve before the infection is fully cured. Thus medicine should be continued for full length of time prescribed by the doctor, otherwise risk of further infection increases. This new infection may be resistant to antibiotics. Patients should stick to recommended dosages, as overdose could be fatal. Dificid should be stored at room temperature and must be kept away from moisture and heat.

Patients, who are allergic to fidaxomicin, should not use this medicine. Patients should consult their allergies, medical history or medications being used. Use of this drug could worsen certain medical conditions. It could produce side effects by interacting to certain drugs especially vitamins, minerals and herbal products. It should not be used for treatment of other types of infections. It is only meant for treatment of Clostridium difficile infection.

It is an FDA approved pregnancy category B medicine. It is expected not to harm an unborn baby. Even then, patients should consult their doctor before using it in pregnancy or suspected pregnancy or planning to be pregnant. Nursing mothers should also consult their doctor before using this medicine. It should not be given to children and anyone under 18 years old.

It could produce side reactions such as fever, chills, flu symptoms or mouth sores. Some patients may also have pale skin, light-headedness, shortness of breath, rapid heartbeats, concentration problems or allergic reactions such as rash or itching. Its use could also cause nausea, vomiting, stomach pain, bloating, gas in stomach, black, bloody or tarry stools, blood in cough or vomit like coffee grounds. Use of Dificid is linked to serious allergic reactions such as rash, sores, redness of skin, itching or sores and abdominal problems including pain and vomiting.