The poor nutrition often experienced by HIV-positive Zambians on antiretroviral [ARV] drug treatment is nullifying the benefits of the medicine, health experts are warning. "Whenever I take my ARVs without eating anything, I begin to feel dizzy and sometimes I even vomit - I generally feel very weak in my body; I have to be in bed for some time unless I took the drugs after eating," Elizabeth Mukwendi, a resident in the capital, Lusaka, one of thousands on ARVs, told IRIN.