Moscow, Feb. 18: The makers of RU-21, a miracle hangover cure, have developed a product to keep you drunk, reports The Daily Telegraph. The California-based Spirit Sciences claims if you take a tablet of RU-21 Red, you need less alcohol to stay drunk. RU-21 Red prolongs drunkenness and enhances intoxication, it said. RU-21, the original product, claims to help prevent long-term diseases associated with moderate alcohol intake.