I will confirm the medicines you listed and advise whether taking quetiapine nightly is appropriate for sleep.

🩺 Medication history (what you report)

• Glycomet 500 SR (metformin 500 mg) twice daily (sustained-release).
• Manigrain 1000 (as taken).
• Altonil SR 10 (melatonin 10 mg) nightly.
• Qutanir 12.5 (quetiapine; you wrote 25 mg tablet) taken SOS (as needed).

⚕️ Can you take quetiapine daily?

• Based on your report, nightly quetiapine for insomnia is generally not recommended because antipsychotics can cause weight gain and worsen blood sugar control, which is risky for someone with diabetes.
• Use of quetiapine daily for sleep should only occur after specialist review (psychiatrist) and diabetes review (endocrinologist).

💊 Safer alternatives to discuss

• Optimize melatonin: lower doses (0.5–5 mg) often work better with fewer side effects; continue sleep-hygiene measures.
• Cognitive behavioral therapy for insomnia (CBT-I) is first-line non‑drug treatment.
• If medication is needed, discuss with a psychiatrist options such as low‑dose trazodone or low-dose doxepin, or a short supervised course of a hypnotic — each needs specialist review given your diabetes.

🏥 Immediate actions (what to do now)

• Do not start nightly quetiapine on your own; avoid increasing SOS use without review.
• Book a psychiatrist appointment to review sleep options and a diabetes/endocrinology review to check glucose control.
• Try improving sleep hygiene and consider adjusting melatonin dose under guidance.

⚠️ Warning signs (seek urgent care)

• Sudden worsening of blood glucose control (very high thirst/urination).
• Severe daytime drowsiness, fainting, or falls.
• New involuntary movements, confusion, or worsening mood.

🩺 Follow-up

• How often are you using Qutanir (days per week) and do you have recent blood sugar/HbA1c results?