You can quarter a 1mg arimidex fairly easily, especially with a pill splitter. The best option for your concerns about your blood would be to monitor your hematocrit and donate blood whenever you are eligible. It's good for you and you'll be helping out someone else. Kind of a win-win situation.
There are 3 loves in my life: my wife, my English mastiffs, and my weightlifting....Man, my wife gets really pissed when I get the 3 confused...
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