Your wife should not change her treatment without discussing this with her personal physician first. Nobody on the Internet knows your wife's entire clinical history. If she were to stop taking a drug, or switch to another drug without talking to her doctor first, any drug changes can be harmful to her health. The drugs I'm talking about here do not just apply to prescription drugs. They also apply to alternative therapies.
Some alternative therapies can interact with certain drugs, and can also have severe side effects.
One of the general guidelines that is now being followed is that once a person begins treatment, they should not stop taking treatment. These are general recommendations, and they may not apply to all people. Of course, the best recommendation I could make is for your wife to follow the recommendations of her personal physician who is familiar with her entire medical history. If you want to find out the status of Nelfinavir being available in your country, my suggestion to you is to contact the company directly by visiting their website. Physicians will usually not prescribe drugs for people they do not know, based primarily on potential harmful health consequences on the patient, and legal consequences on the physician.