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- Heart Disease
I've been dealing with sinus tachycardia, and my doctor suggested I try met xl 12.5 mg. I've been on it for a few days, and while my resting pulse rate has dropped a bit from 100 to 90 bpm, it still jumps to around 105-110 bpm when I'm doing normal activities. I'm wondering if it's safe to up my dose from 12.5 mg to 25 mg, and how long would be okay to stay on that higher dose?