Chest Congestion / Prescriptions?

For you in the Medical Profession. I have lung problems . . let's leave it at that . . and as a result I have some problems associated with that, in that I can catch colds easily and cannot shake them and they go right into my chest . . . As a result, it is not uncommon that I have to get on an antibiotics to clear it up and something to break up the mucous and help the coughing. When I see my doctor when I am crashing badly and obviously not on the mend . . I ask for Tussionex Pennkinetic Susp . . .as it really helps. I know it is categorized as"addictive" . . I'm not talking about using it as a lifestyle . .I'm addressing illness. When I get a prescription . . I invariably get a little bottle and it is about qtr full. maybe 50ml if I'm a good boy. (I'll be 60 in April by the way and have no history of addictions or abuse)

I know the stuff can be dispensed in larger qtys . . as the first time it was prescribed to me . . It was a large 300 dose prescription. Well . . I never abused it and used it only when it was needed . . . When I need it now, it's doaled out in such meager portions . . I find it most irritating to be treated this way . . . I get severe respiratory infections only occasionally . . .but the dose of cough medicine I'm prescribed is so small that I must call and beg a refill or come back in and do an eye to eye so the doc can charge additional office visit (imo) . . it's not like I'm remiss in going to him in the first place.

So . . without further ado . . has something changed in the profession with prescribing "addictive" remedies . . or should I just look for a new doctor? I haven't actually taken him to task regarding this, but I have been very clear that I wanted a reasonably dosed prescription instead of a tiny bottle good for 3 or 4 days on more than one occasion over the last few years. . . . to no avail.

Suggestions or enlightenment please.