 [ Symptoms ] my baby aged 4 months& has hydrocephalus fluid in brain is it allowed to give for her virus vaccine injection help we already gave her the first virus vaccine injection [ Disease ] i have to say that medications are not the same as milk they will not sour in most cases but beyond their expiration date they may lose some potency especially if they have not be stored properly your cipro may be okay but i would advise you to check with your pharmacist first