Also discuss with your doctor if: 1) You are already taking any medication or food supplement 2) You are planning or have become pregnant during Levaquin treatment 3) You are feeding as baby 4) You are allergic to any drugs 5) You suffer from any disease 6) You have had a transplant of organs Some medications like antarirhythmics, insuline, corticosteroids, anticoagulants, non-steroidal anti-inflammatory drugs, and others may interact with levofloxacin. Contact your doctor for being sure, because the simultaneous administration of any of these drugs with pill when you buy Levaquin can increase their side effects. In this case you may need a dose adjustment, or the cancellation of Levaquin administration. It is absolutely necessary to consult your doctor before starting any kind of treatment. Only a medic is able to decide upon the medications you should take. Dont borrow Levaquin from anyone, lead by the principle that if it helped your friend it helps you as well. It can be vice-versa. It can seriously damage your health condition if it was not prescribed to you by a doctor.