Flonase dilemma

Hi, I normally post on the fibromyalgia forum, but I'm having a problem that would probably be better covered here. Two of my family members use Flonase for their allergies. I don't know if any Flonase users have noticed this, but this medication leaves a strong sour smell in the room it was used in and lingers around the user for quite awhile after use.

Now my problem is that I'm extremely sensitive to odors(both chemical and natural) and the smell of the Flonase makes me nauseous, makes me cough, and sometimes even gives me mild asthma symptoms. This really makes it hard for me to be around these family members after they use the product and I try to avoid them, but this isn't always possible. I know I can't ask them to stop using this medication or switch to another, and knowing them, they'd probably refuse even if I did ask them since my reaction isn't life threatening.

Does anyone have any ideas for how I can deal with this?

Well my sister does it in her bedroom, but that doesn't really help because the smell lingers around her for hours after she uses it. It's really bad the times when I have to drive her places. My mother, who is the 2nd family member that uses it, doesn't even have a bedroom, she's taken up residence in the living room.

*sighs* I've told them how it effects me, but they don't seem to care, or at least not enough to make accommodations for me. This is just one thing in a long list of things they do that really bother me. My mother won't give up her hairspray even though it bothers my asthma, and they are always buying scented products that bother me(soap, shampoo, detergents). Sometimes I wish I would react badly enough to something to land me in the hospital so they would take it seriously.