I had taken some extremely painful 200mg per ml fast acting test of one thailand brand.I found heating up the gear in the syringe in a hot water helps with reducing pain.I think it had a high amount of alcohol in it.I also used to take a hot water bath & use a heating pad at times.If its from an underground lab its bound to pain.Nowadays when i started using MTS gear no pip at all.Totally painless.i tried med mutation,shreaded,tren ace & a few other products.