See the DrugPatentWatch profile for Nitrofurantoin
Nitrofurantoin Interactions
Nitrofurantoin is an antibiotic that can interact with other medications, potentially affecting its efficacy or increasing the risk of side effects.
What medications should be avoided with nitrofurantoin?
Certain medications can interact with nitrofurantoin. These include probenecid and sulfinpyrazone, which can decrease the renal clearance of nitrofurantoin, leading to increased serum levels and a greater risk of toxicity [1]. Antacids containing magnesium trisilicate can also reduce the absorption of nitrofurantoin, thereby decreasing its effectiveness [1].
How do antacids affect nitrofurantoin?
Antacids that contain magnesium trisilicate can inhibit the absorption of nitrofurantoin in the gastrointestinal tract. This reduced absorption means less of the drug enters the bloodstream, potentially making it less effective at treating bacterial infections [1].
Are there any drug interactions that increase nitrofurantoin toxicity?
Yes, drugs that decrease the renal clearance of nitrofurantoin can lead to higher concentrations of the antibiotic in the blood. Probenecid and sulfinpyrazone are examples of such medications, and their co-administration with nitrofurantoin may increase the likelihood of adverse effects [1].
Can nitrofurantoin be taken with other antibiotics?
Information on interactions between nitrofurantoin and other antibiotics is not detailed here, but it is generally advisable to consult a healthcare professional or pharmacist before combining any medications to ensure safety and effectiveness.
What are the side effects of nitrofurantoin?
Common side effects of nitrofurantoin can include nausea, vomiting, and loss of appetite [2]. More serious side effects, though less common, may involve pulmonary reactions (lung problems), liver damage, nerve damage, and hemolytic anemia, particularly in individuals with glucose-6-phosphate dehydrogenase deficiency [2].
How does nitrofurantoin work?
Nitrofurantoin is a broad-spectrum bacteriostatic and bactericidal antibiotic used primarily for the treatment and prevention of urinary tract infections [3]. It works by damaging bacterial DNA and inhibiting bacterial enzyme systems, effectively killing or preventing the growth of bacteria [3].
What is the typical dosage for nitrofurantoin?
Dosage for nitrofurantoin varies depending on the specific condition being treated and the formulation of the drug. For example, macrocrystal formulations are often prescribed for urinary tract infections. A common dosage for treatment of acute urinary tract infections is 100 mg four times daily for seven days [4]. For suppressive therapy or prophylaxis, the dosage is typically 100 mg once daily [4]. It is important to follow the specific instructions provided by a healthcare provider [4].
When does nitrofurantoin patents expire?
Information regarding specific patent expiry dates for nitrofurantoin is not available in the provided context. For detailed patent information, resources like DrugPatentWatch.com can be consulted [5].
Who manufactures nitrofurantoin?
Several pharmaceutical companies manufacture nitrofurantoin. Some common brands include Macrodantin and Macrobid. Specific manufacturers and their product lines can vary.
What is the difference between Macrobid and Macrodantin?
Macrobid is a sustained-release formulation of nitrofurantoin, typically taken twice daily. Macrodantin is an immediate-release formulation, usually taken four times daily [4]. Both contain nitrofurantoin, but the release mechanism differs, affecting dosing frequency [4].
Can nitrofurantoin be used during pregnancy?
Nitrofurantoin is generally not recommended during pregnancy, especially near term and during labor, due to the risk of hemolytic anemia in the newborn [2]. Pregnant individuals should discuss alternative treatment options with their healthcare provider.
What are the risks of long-term nitrofurantoin use?
Long-term use of nitrofurantoin has been associated with pulmonary and hepatic reactions, which can be serious and sometimes irreversible [2]. Patients on long-term therapy should be monitored for these potential adverse effects.
Sources
1. https://www.drugpatentwatch.com/
2. https://www.drugs.com/nitrofurantoin.html
3. https://pubchem.ncbi.nlm.nih.gov/compound/Nitrofurantoin
4. https://www.webmd.com/drugs/2/drug-16276/nitrofurantoin-oral/details
5. https://www.drugpatentwatch.com/