Bloating/ gas/ pain: May be food intolerances, record what occurs when eat dairy, gluten soy, or try no dairy x 1 wk ,then no gluten x 1 week then no soy x 1 week, Constipation-even w/ BM can cause pain and gas, try Gas-x 1 before meals & milk of magnesia (magnesium hydroxide) 1 tablespoon 2x/day x 4, Check stool guiac, reflux , h pylori, vaginitis ...
That means a 10ml bottle of 20mg nicotine e-liquid would have 200mg of nicotine in it (20mg x 10ml). Likewise, a 30ml bottle of 20mg e-liquid would have 600mg of nicotine in it (20mg x 30ml). When you refill your e-cartridges with e-liquid, you may need to know how much nicotine is contained in your refilling e-liquid.
For instance, that bottle I linked to earlier contains 3,600 milligrams of nicotine total. We may not know the exact lethal dose of nicotine, but I'm not about to chug 3,600 milligrams in hopes of finding out.