"Happy Pill"? Not sure if I understand what I read, but it blocks the receptors and fools your body into producing more endorphins? Am I correct?
Happy Pill ?? You are asking or insinuating one gets high from this medication? No it has no psycho pharmacological effect other than improving mood. Refractory depression can be banished with its use.
Happy as in finally enjoying a quality of life otherwise seen as unattainable? Yes.
Your summation that endorphins are increased is correct. Understanding the key importance endorphines play in modulating the immune system is critical for a clinical understanding.
The links I provided are authored to allow a lay person to understand the benefits, limitations and amazing results of LDN. Other than my on personal use and the fact that I am alive today, I can offer little more than answering questions or concerns not available on line and this isn't the forum for that.