I suffered what doctors thought was an anaphylactic shock during general anaesthetic a few months ago.i am now diagnosed with both copd stage 2 and asthma.were these conditions the more likely cause?

Not likely: The COPD is not likely related to the anaphylaxis. The asthma may be a sign that you are more "atopic" or allergic. As there are many with asthma that have "hyperactive" immune systems that "react" to many different allergens more strongly than others. But overall it's more likely the anaphylaxis and asthma are unrelated. Hope this helps.

Anaphylaxis: Anaphylaxis is a severe, potentially life-threatening allergic reaction and can trigger shock and difficulty breathing.. It mostly likely occurred because you were allergic to the anesthetic medicine used. Because of your COPD, the event was worsened by your poor lung function. I hope you are making attempts to discontinue tobacco use.

Possibly: Anaphylaxis, or severe allergic reactions, can cause asthma-like symptoms that are very hard to distinguish from asthma or COPD. You may have had an episode of bronchospasm as a reaction to airway manipulation, or a reaction to antibiotics or muscle relaxants, which are the most common meds that cause reactions under anesthesia. See a pulmonary specialist and/or an allergist to help diagnose.