I'm 62, and have had asthma since a baby. It thankfully does not affect my daily life, (unless I go up a hill and then I get a bit breathless) but my peak flow NEVER goes above 240, and hasn't for years. I've had a lot of hospital tests, and been put on various inhalers, but nothing makes any difference - even 8 puffs of Ventolin. I take Symbicort, and always carry my Ventolin, but why can these drugs not improve my peak flow? Should I be worried? Is there anything else I can do? I would be very grateful for any advice.