Promethazine / Mirtazapine as anti-Es for SN method??

[Rexo]

Hi all. I have been a longtime lurker on this forum. Am quite shy and more prone to silence but have gained knowledge and comfort from many of your posts knowing that there are other people for whom suicide is a constant thought. Anyhow I have SN and will hopefully be able to get ranitidine in next couple days. On the anti emetic front I have read that promethazine and mirtazapine are possibilities. I have both through prescription. Could somebody suggest for me a regimen/dosage? Is ranitidine 800mg 30 mins before like tagamet? And how about promethazine and mirtazapine? Thankyou so much and best of luck to all of you in finding what it is you're after.