Retinoids have been proven to be one of the best products for anti-aging. Regular use will stimulate your skin to make collagen, and improve the texture and tone of your skin. You may also notice an more even appearance of the pigmentation of your skin.
When you start to use a retinoid cream for the first time, you will probably have some skin peeling or flaking, which is just your skin exfoliating and is not a sign of allergy or intolerance to the cream. If you are very dry, try using the cream every other night for a couple of weeks and then go back to using it every night. Unless you get very red or irritated, keep using the retinoid cream and your skin should adjust to it and stop feeling dry after 2 to 3 weeks.
However, no amount of retinoid cream will make up for the fact that you smoke. Smoking is one of the worst things you can do for your skin, not to mention the risks to your heart and lungs. Smoking damages the collagen and elastic tissue in the skin, leading to wrinkles and skin sagging. It also decreases the circulation in the skin leading to a sallow complexion. You will also develop vertical lines around your lips, that are very difficult to treat and may require Botox, filler injections and laser procedures to improve.