Hi, I might be some anecdotal help here.
My friend likes meph, thinks it's great. He had a heart attack five years and one month ago. From a furred artery. Now still plays sports (not very well), no tobacco any more, couple of stone lighter.
Likes MDMA - doesnt take his aspirin on the day he says as these things tends to thin yr blood. Takes his other pills as normal, blood pressure and statins.
But MDMA is a huge load, great fun, loves it, but shit back at work on tuesday/weds he says. MDMA is a strong drug. Makes him angry and irritable in midweek.
Mephedrone is at its best, he says, when you do not do too much. If you want the bigger bang, do MDMA.
If you want something that is all-round less bother - and he is 44, not 24 anymore - then do one capsule and maybe an extra half an hour and half later. ~ 300mg.
It does have MDMA like qualities, friendlieness, chatting, energy, but it is nowhere as powerful. My friend thinks that is the good thing - and the bad thing - about the drug. He is a big believer in hubris.
If you take five or six capsules ~ 1000 - 1200mg - that appears a needless risk to my friend.
As an example he was out Friday with another pal. He and the pal are going home at 5am after 300mg each and the friend says `i could have done four of them easy`.
Next day they speak and the friend goes `im glad i didn't do four.`
Even though the big high wears off within 1.5hrs the residuals are quite nice, energy, smiles, music sounds good.
He says you should take it as it is, don't do too much.
As for his heart it does nothing - try rowing on a rowing machine for 30 minutes straight - that almost makes his heart jump out through his mouth. As for a whitey on weed and alcohol (he had one since his heart attack) he saud that was the worst drug experience he's had since the attack.
For you info.