Well, that is your choice. Cry about big pharma, which has nothing to do with a degree and 7 or more years of study of the human body and medical conditions. Personally, I prefer to treat the cause of the condition, rather than slap a bandage on the symptoms. These drug interactions you keep crying about are pretty much non-existent since your medicines are documented by the pharmacy and possible interactions cause an alert, so the pharmacist can alert your doctor and substitute a treatment that does not interact. I found out recently a simple antibiotic can react with my blood pressure meds.. The pharmacist alerted me and I was given a different antibiotic. We aren't talking about 50 years ago where interactions were hit or miss.
Basically, in telling a person that has never used nicotine before that it may help with some symptoms, you are playing doctor. You have no business suggesting they take any drug. If they choose to it is their life, and not yours to play with because of your OPINION. If you want to use maggots to prevent a wound from getting infected because there are no possible drug interactions, fine. But I'll stick to polysporin and the PROFESSIONAL advice of a Doctor and Pharmacist.
Have you ever considered that perhaps your headaches are caused by nicotine withdrawl after smoking for many years? Just like if I dont have my coffee, I get headaches. That isn't saying coffee cures headaches, that is just saying coffee prevents caffeine withdrawl symptoms. If I never started drinking coffee,I wouldn't get the headaches caused by withdrawl.
And honestly... I buy my VG and PG from the pharmacy! If I could get my nicotine from the pharmacy, I would do that too. But, I promise you, somewhere along the supply chain, someone is getting nicotine from a pharma lab.
Now that having been said, I use nicotine in my ejuice. I used nicotine when I smoked cigarettes. I know nicotine is less harmful than caffeine, but STILL I recommend that if someone has never used nicotine, NOT to start using it. Just the same was as when I was smoking, I would advice others not to start smoking. You don't have to use nicotine to enjoy vaping, and if you never smoked and want to vape, you are better off. And if you have any of those conditions, you are better off seeing a doctor for treatment, than listening to some random person that does not have to suffer the consequences of her own advice, if that advice proves harmful to the person in question.
If those headaches are caused by high blood pressure, is it YOU that has to spend the last 10 years of life, sitting in a wheel chair drooling and pissing all over themselves because they had a stroke after they took your advice and used nicotine as a bandage treatment for the headache?