tobacco smoke contains carcinogens Carcinogenic components of and tobacco smoke: A 2022 update The tobacco body

The 24 hour patches are suggested for smokers that have their first cigarette within half an hour of waking, the 16 hour patches are suggested for those who smoke after 30 minutes of having woken up

PMID 30522569

The change needed to be made, she said

The onset is slower you might not feel the full effect for 3-5 minutes but the nicotine delivery is steadier and more sustained throughout the session

If you use cannabis Smoking cannabis doesnt disqualify you from giving blood

(ii) technical failures of any kind, including but not limited to the malfunction of any computer, cable, network, hardware, software, or other mechanical equipment