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During an average follow-up time of more than seven years, lithium treatment was associated with the lowest risk of rehospitalisation in mental or physical disease, with a risk reduction of about 30 per cent compared with no treatment at all. Long-acting injections of antipsychotic drugs were also effective. The risk of re-admission was around 30 per cent lower if patients were treated with long-acting injections compared to their receiving the same antipsychotic medication but orally. The most commonly prescribed antipsychotic drug for bipolar disorder, quetiapine (Seroquel), which is given in tablet form, reduced the risk by only 7 per cent. - www.sciencedaily.com