Clen blues

Morning gents.

Ive been using clen a few weeks now at 40mcg/day.(actually more like 5 weeks)

Anyway, Im quite happy with and noticed that it gave a pleasant boost of energy everyday.

Now I have been taking concerta daily for about the 5 years (under the supervision of a neurologist).

Now both of them are stimulants and worked very well actually. My concentration, focus and energy levels are fantastic however, when I drop clen within a day I feel drained and fatigued. Im currently on 13.5% bodyfat and would like to drop a lil more though. Is this sudden drop in energy normal and if so how can I get around it?
What would be the longest that I could safely run clen (I use beta sleep at night to keep the receptors fresh and monitor my BP and heart rate constantly).
When I do end the clen, what else can I switch to for a nice fat burner? Cytomel looks good however I dont know if my bf % is low enough to justify a cycle.

Regards

I'm not experienced enough o comment on why you feel the way you do when you drop the clen. Have you tried to taper the dosage down slowly to ease out? I personally don't like to run clen for more than a month at a time,it's not good for the heart. Maybe you could swith to duromine or something along the lines of a appetite supressant?

Thanks for the reply. Im taking the minimum dosage currently (1 tab daily).

Appetite control is 100%, I need something to increase energy levels.

i don't know if an ECA stack would cause any negative effects while taking concerta, but if not then Hyperburn is a good option,especially stacked with GW501516 - amazing stamina/energy increase and dropped body fat.

Please list all chronic meds and medical diagnosis.