Giardiasis (gee-ar-die-a-sis with a soft G ) is an infection of the small intestine that is caused by the parasite, Giardia duodenalis, also known as Giardia lamblia and Giardia intestinalis. Considering Eloping or an Intimate Destination Wedding in Colorado? Colorado is ranked 7 in the United States, and one of the top 20 locations world wide for elopements and destination weddings. Flagyl (metronidazole) is an antibiotic prescribed to treat various parasitic and bacterial infections (Giardia, C. diff, H. pylori). Common side effects are headaches, nausea, and metallic taste in the mouth. Pregnancy and breastfeeding safety information are provided. Generic Metronidazole no RX! Only Top Quality Pills! Low Cost Pills. Save money from each order. High Quality generic and Original Metronidazole Seachem first started around 1983 in a basement; today SeaChem Laboratories is one of the leading cutting edge aquatic conditioner, treatment/medication, and general aquarium pharmaceutical companies. Eventually, Pheifer et al. reported, in their 1978 New England Journal of Medicine paper, on an oral regimen of 500 mg metronidazole twice daily for 7 days that eradicated Haemophilus vaginalis in. on treatment outcomes from an open-label, randomised controlled trial to compare a single dose of 2 g of metronidazole (single-dose group) with 500 mg of metronidazole twice daily for 7 days (7-day-dose group) for the treatment of trichomoniasis in women who do not have HIV. Implications. Metronidazole is mentioned in the ESCMID guideline as first-line therapy, but we propose that oral vancomycin will become the first choice when antibiotic treatment for CDI is necessary. Pharmacodynamics Antibiotic of the family of nitro-5 Imidazol (J: Anti-infectious) Pharmacokinetics Distribution : Intravenous injection of 500 mg of metronidazole produces after a single infusion an average peak of 18 mg/l at the end of a 20-minutes infusion. Trichomoniasis can potentially spread from one person to another via any form of sexual behavior that involves genital touching. This may include different types of sexual activities, but vaginal intercourse is the primary method of transmission.