The Independent's health editor Jeremy Laurance looks at the impact of a new anti-HIV pill that can provide effective protection against the disease.The Telegraph reports that binge drinking doubles the risk of heart attacks.And millions of patients are at risk of blood clots in hospital because guidelines for their prevention are being ignored, claims the Telegraph.Good news for chocolate lovers as researchers discover that chocolate may ease chronic fatigue syndrome, the Telegraph reports.The ban on mephedrone has been blamed for a rise in deaths from cocaine, the Independent claims.The Guardian reports on a study showing that addicts should be involved in shaping their own treatment.The Pope has decreed that female sex workers should be allowed to use condoms in a further volte face on the Papacy's position on contraception, the Independent reports.The Telegraph covers a statement by the Royal Society of Medicine saying that the benefits of aspirin for the over-45s far outweigh the side-effects.The Telegraph also carries an "Expert View" column, which discusses the pros and cons of taking aspirin in people at high risk of colorectal cancer.And the Daily Mail suggests that a ginger root extract should be given to patients to prevent DVT.