What should you know before you buy antibiotics online? This is a key question you need to know answers to before ordering antibiotics from online pharmacy. In this short review you will find all necessary recommendations before you buy antibiotics online. Antibiotics work only against certain strains of bacteria. Some bacterial micro-organisms are resistant to the action of certain antibiotics. Antibiotics do not work against viruses, protozoa, yeasts. Neither Amoxicillin, Ciprofloxacin, Zithromax not Doxycyclyne does work against these micro-organisms. Though some of them may relieve and even mask the symptoms of certain infections (as syphilis). Thus before you buy antibiotics online, you must know your condition for sure. Antibiotics must be taken for a certain length of time in exact dosages. Antibiotics work by preventing bacterial DNA structures from replication and thus bacterial stop growing. The success of treatment depends on the constant level of the active ingredient in the blood or urine of a patient. Thus before you buy antibiotics online, please, get sure in due dosage and length of treatment. Antibiotics are not safe, they can worsen certain conditions and can cause anaphylaxis. To avoid unwanted reactions you must know that you do not have contraindicating conditions.