I am new to the forum as of today, but I am more than happy to share my experiences with Paxil CR and recently, the generic form made by Mylan.
I started taking Paxil CR 12.5mg (once a day) and have been on it for three years. It was prescribed to help with my panic attacks and generalized anxiety. I don't have any side effects from it, but this could be because I take it at bedtime, so I'm asleep as it's working. I would definitely recommend this!
It has been awhile since I first started taking it, but as I remember, it took almost a month and a half for my feelings to sort of "level out". Sometimes I felt good, and sometimes I felt bad. I still have good days and bad days with anxiety, but the Paxil has really helped with panic attacks (have only had maybe 5 in the past 3 years).
I was nervous about the new generic form of the Paxil CR, as I got it a few weeks ago when I got a refill, but so far so good. I feel no different than before, so please don't feel anxious about taking it (i did at first).
As for your increased dosages, it's hard to say because everyone reacts to medications differently. It depends on how long your doctor is waiting before increasing your doses each time. For me, it took almost 2 months to become "leveled out" on the 12.5mg. I also think it's important for you to talk with your doctor and let him/her know what you are comfortable with. I know at one time my doc wanted to increase me to 25mg, but I said no because I want to stay on the minimum dosage possible, while realizing that the medication is not a "cure all" but it does help me in some ways (panic attacks). As for my anxiety, it is a daily struggle. And it's so frustrating when you have a good day because you feel like you can do anything and then a bad day hits and you're on a downward spiral. Just hang in there!