The drama surrounding the inhalable drug delivery specialist Vectura (LON:VEC) continues. On Monday, Philip Morris boosted its offer to acquire Vectura to 165 pence ($2.30) per share, beating Carlyle’s latest offer of 155 pence ($2.16). In July, Philip Morris (NYSE:PM) agreed to acquire inhaled drug delivery technology developer Vectura for $1.2 billion, drawing criticism from the American…