Smoking and Intoxicants

Is smoking harmful?

Q:

1. Is smoking a cigarette haram and is consuming paan haram? As we know that smoking is the #1 preventable cause of death. I have been confused about smoking cigarettes. I have heard that its haram because it damages your health, it's a waste of money, and Allah says وَلاَ تُلْقُواْ بِأَيْدِيكُمْ إِلَى التَّهْلُكَةِ and smoking is literally destroying yourself. I have also heard its makrooh, so which one is it? Also about paan, it damages your health as my uncle has lost his teeth due to it.

2. How do you reply to someone who says that my death has already been written by Allah. A cigarette can't kill me faster or change my death date. What do you say to them?

Taking drugs

Q: Can my wife and I take a bit of the drug ecstacy purely to enhance our intimate relations, we will be alone together and not doing anything wrong and going anywhere.

Smoking weed

Q: My brother has smoked weed and me and my family are very worried, will this mean his duas won't be accepted for 40 days?

What is the ruling and is weed really bad?