Please Select Acyclovir Adipex Aldara Allegra Alesse Ambien Bontril Celebrex Cialis Cipro Clarinex Clarityn Cyclobenzaprine Denavir Didrex Fioricet Flexeril Flonase Generic Prozac Ionamin Levitra Meridia Nasonex Nexium Ortho Tri-Cyclen Paxil Phentermine Prevacid Prilosec Propecia Reductil Renova Retin-A Skelaxin Soma Sonata Tenuate Tramadol Ultram Uprima Valtrex Vaniqa Viagra Vioxx Xenical Zanaflex Zyban Zyrtec Zyban There are more than 4000 chemicals in cigarettes that cause harm, some of which can lead a person to develop heart disease, high blood pressure, and risk for various types of cancer. Smoking can also lead to other health problems such as impotence in men, and earlier onsets of menopause in women as well as complications with pregnancy.