HI Sasha,
I will do my best to provide some useful information for you on Milk Thistle and Alcohol Consumption, but of course, cannot give you medical advice without knowing you as a patient. So, I will share my insights as best I can in a theoretical sense. If the cold and rash persist, definitely see a physician to get some feedback for your body.
I know my liver is not in great shape. I have been a heavy drinker for about 4 years. I am curbing my drinking but am wondering if i will gain benefit from the supplement even though I still drink occasionally.
First of all, the human liver is one of the fastest organs in the body to heal. Still, long term alcohol use can damage the liver as we know very clearly. Milk Thistle is used very often to help the liver recover from damage due to alcohol consumption and many studies point to it being effective. There is no problem mixing alcohol with Milk Thistle, as the active ingredient of Milk Thistle is alcohol soluble.
As we all know, heavy alcohol consumption is not good for the body or the liver. Milk Thistle will help, but cannot protect a liver from someone drinking a bottle of Whiskey a day.
Also I have come down with a strong cold and my skin has broke out pretty heavily since I started taking it. How long does that last? Also is it likely that my sickness is due to detoxification of the liver?
This type of reaction can be from detoxification itself, the weakening of the immune system due to detox, an allergic reaction, or simply a cold. I can't tell you which it is for you as we have never met and I don't know your personal health history. I can say that some people have this type of reaction as a detox symptom, but it is not too common. I would personally stop taking the Milk Thistle if it persists past 2 days and see if it goes away. If it does go away after you have stopped, try another brand. Look for one that is 100% organic, as some extracts are made with very harsh chemical solvents, which you may be reacting to. When you start again, use a low dosage and make sure that every day you have a good bowel movement. If you start to move the bile out of the Liver in large quantities with any supplement, and the bowels are not moving, the toxins being released can get re-absorbed into the system and the symptoms you described can result.
You asked how long the symptoms can last. If it is detoxification, it may last two to three days (maybe a week) as long as the bowels are moving daily. If it is an allergic reaction, until the allergen is removed. If it is a cold, . . .
I hope this helps. Let me know if you have any more questions, and I'll do my best to answer.