Suggest Effective Alternative Substitute For Seroquel
Doxepin or Suvorexant might be alternatives.
Detailed Answer:
I read your question carefully and I am sorry about the many problems you have had to face.
Seroquel is not typically used for sleep, but then again I guess yours is not the most typical situation and you have tried some other alternatives without success.
In this situation since generics are giving such side effects one alternative would be looking at another antipsychotic drug, meaning the same class as Seroquel, with similar effect on sleep. Two alternatives which could be considered would be Olanzapine or Clozapine.
An alternative from a different group might be an antidepressant. Doxepin is an antidepressant which is also effective and approved for insomnia. The necessary dosage for insomnia is much lower than that for depression, so not likely to induce any liver damage.
There is also Suvorexant a drug with a different mechanism of action than all those you have tried, but it's a new drug (not available at all where I live), and I am afraid the price in the US should be quite high, so unless your insurance covers that I don't know whether it's affordable.
Of course these are prescription drugs and should be discussed with your physician.
I hope to have been of help.