tbh cigarettes and heroin withdrawals are way too different to compare, they are both equally hard in their own way. heroin withdrawals are painful both physically and mentally, I know this because I'm currently tapering off of a drug containing buprenorphine and naloxone after being addicted to opiates for 5 years (I'm currently 20 so I was hooked at age 15). This drug helps the physical side, but there is no euphoria so I have to deal with everything I was trying to cover up. for me, nicotine withdrawals only effect me mentally, my anxiety goes through the roof, my insomnia gets worse, and cigarettes are so easily obtainable that it's hard to say no to buying a pack and lighting up. I've been smoking since I was 14 (so 6 years) and I'm still a daily smoker. it may be so hard for me to quit smoking since I'm currently working towards getting off opiates completely, yet either way I look at it, I'm off heroin, but I'm still a smoker. however, I'm planning to stop smoking once I'm off suboxone.