Isotretinoin
Isotretinoin is a teratogen; there is about a 20–35% risk for congenital defects in infants exposed to the drug "in utero", and about 30–60% of children exposed to isotretinoin prenatally have been reported to show neurocognitive impairment. Because of this, there are strict controls on prescribing isotretinoin to women who may become pregnant and women who become pregnant while taking isotretinoin are strongly advised to terminate their pregnancies.
Tijuana
Tijuana has many pharmacies that target visitors from the United States, which sell some medicines without prescriptions and/or at much lower costs than in the U.S. Many medications still require a Mexican prescription, which can be obtained from adjacent doctors' offices. People filling up prescriptions for drugs classified in the US as Schedule II or Schedule III have found it more difficult to locate such medications, and the purchase of pseudoephedrine also has become restricted by Tijuana pharmacies, just as in the U.S. To fill a prescription in Tijuana for any drug covered by the US Controlled Substances Act and legally bring it into the United States requires a prescription from the United States for re-import. Americans can import up to a 90-day supply of non-controlled medications for personal use to the USA from Mexico and other countries.