I was prescribed 300 mg 3x day for seven days, because of a dog bit. After an hour of taking the medication I started to have sever adomial pains. After the third day I started to get dizzy spells and was laid up in bed for two days with a extremly bad headache. After the fifth day I ended up in the hospital due to hives from head to toe. This was the only medication I was taking at that time.