A study to assess the adverse effects of anti-retroviral drugs shows that two widely-used HIV drugs are associated with an increased risk of heart attack/the formation of blood clots in the heart. With the use of Didanosine, the risk of developing a heart attack increases by 49 percent; with Abacavir, the increased risk is 90 percent. The effect is most pronounced in patients with a high underlying cardiovascular risk.
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