Quote from wjf9838 on 04/03/12 at 05:25:38:.5mg, that should be your lowest dosage.
No it shouldn't. Instead, try experimenting and find the lowest dose possible, that works for you. Everyone is different, and everyone has different expectations. Normally you want to find the sweet spot between minimizing exposure to the drug and maximizing the benefits.
There are many reports of people around who do indeed need less in later years/cycles.