L-Arginine is a non necessary amino acid and is essential for regular performing of the pituitary gland. When looking at Nexium vs Prilosec they may be virtually identical. Each drug can be found in an alternative dose and will supply for similar problems however there are some differences whenever you look at Nexium vs Prilosec. When comparing Nexium vs Prilosec one major factor is price in accordance with one website Prilosec costs around $20 per month while Nexium costs around an astonishing $190 month after month. Other facts you could uncover comparing Nexium vs Prilosec include that Nexium is newer, that it is limited in it's official use understanding that while Nexium is available Prilosec is found non-prescription inside your pharmacy.