Skip to content


    Exciting News for WebMD Members!

    We've been busy behind the scenes building new message boards for you. You'll have new and easier ways to find messages, connect with others, and share your stories.

    And, this will all be available on your smartphone or other mobile device!

    What Do You Need to Do?

    The message board you're used to will be closing in the coming weeks. While many of your boards will be making the move to our new home, your posts will not. Want to keep a discussion going? Save posts you want to continue (this includes your member profile story), so that you can re-post them in the new message boards.

    Keep an eye here and on your email inbox, we'll be back in touch soon to give you all the information you need!

    Yours in health,
    WebMD Message Boards Management

    Concerned about low Peak Expiratory Flow Rate
    WorriedJohnyBoy posted:
    I was diagnosed with asthma at 16 after getting pneumonia. I never used an inhaler and still presumed swimming 4 days a week. I'm now 30 and just recently quit smoking marijunana after 10 years, never touched a cig in my life.

    To top it off I suffer from GAD (generalize anxiety disorder and OCD). I read an article yesterday about marijuana and emphysema at a young age. This put me in panic mode and I quickly made an appointment with doc to been next week. I even went out and purchased a brand new FLOW PEAK METER made by omcrom. I came home and tested, my numbers were really low at 450, the highest was around 500. The normal rate for someone my age and height is 622. I'm barely at 450. I'm only 150lbs, not sure if this has any affect to score.

    The meter I purchased 1/5 star reviews on amazon, mainly about the quality but some are complaining that the meter always shows 80-100 lower compared to other meters Not sure what to make of it. I'm scared and can barely focus. I just had a son, now I'm afraid I wont be around to see him grow up. I have no wheezing or any asthma attacks in my whole life.

    Is there anything I can do to get my rate to normal or is it downhill from here? Please any insignt or reassurance will be helpful. I'm new to this.
    amcate responded:
    First off, I'm not a going to a pulmonologist is probably best. The reason I'm saying a pulmonoligst and not an allergist in this case is because you're mentioning emphysema, which is a different disease than asthma. Allergists are normally very good specifically with asthma, though...which you say you either would probably help some.

    Peak flow meters are fickle. Normally, you take 3 readings and record the highest unless one reading is way different than the others (500,510, 200 would lead you to disregard the 200 and get another reading). Also, keep in mind that the norms on those things are only descriptive numbers describing a population. People vary in what is normal for them as an individual. This is why often allergists will determine the individual's personal best and take their peak flow reading as a percentage of personal best. So, if you don't have symtoms, it could be normal variation between individuals...but I would consult a pulmonologist to be sure. The charts I've seen on spirometry do take weight into account....but for peak flows they use my personal best and not the norms.

    My allergist told me it's common for peak flow meters to vary one from the other in readings...which is why I normally use the same peak flow meter over time. They aren't as exact as an in office spirometry reading.

    Congratulations on quitting the marijuana.

    Helpful Tips

    Sports Asthma
    I Have sports related Asthma. I joined the Army and we ran A LOT! the more i ran the better i felt and less my asthma bothered me. i am no ... More
    Was this Helpful?
    5 of 5 found this helpful

    Related Drug Reviews

    • Drug Name User Reviews

    Report Problems With Your Medications to the FDA

    FDAYou are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

    For more information, visit the Duke Health Asthma and Allergies Center