Does anyone know a reliable source in the US for a dual orexin receptor antagonist for sleep, specifically daridorexant (Quviviq), lemborexant (Dayvigo), or suvorexant (Belsomra)? I’m particularly interested in whether any research-chemical companies sell properly dosed capsules/tablets with independent testing, rather than raw powder. Also interested in people’s experience with these for sleep maintenance / early-morning waking, especially whether they caused less next-day grogginess than antihistamine-type sleep meds? Thanks