I have been prescribed Rifaximin 550mg 1 x daily for three months. It is hideously expensive for this course in the UK as I will have to buy from my local pharmacy 2 x packs of 56 at a cost of £520 - that about 790 US Dollars. I actually don't have this much money to buy them, plus I am worried I will buy the smallest pack size (56 tablets at a cost of £260) only to find I cant tolerate them. this is not unusual for me and I have a whole cupboard full of drugs I cant take. Can anyone advise on a REPUTABLE online pharmacy where they might be cheaper and that is legal in the UK - I have a European prescription. For info - I had a seizure on Saturday that lasted half an hour and happened after taking a new inhaled asthma drug, I have MCAS and we are considering it an allergic reaction, but it has left me more ill than before.