CVM is especially concerned that pet owners are going online to buy two types of commonly used prescription veterinary drugsânonsteroidal anti-inflammatory drugs (NSAIDs) and heartworm preventives. Both drugs can be dangerous if there is no professional involvement, says Hartogensis.
Fetal growth may be further impaired by the tendency of marijuana to increase the heart rate and blood pressure28 of the mother, thus reducing placental blood flow to the fetus. In addition, cocaine and marijuana, when used together, may exert a synergistic effect on both heart rate and blood pressure.29.
Studies of marijuana in pregnancy are inconclusive, because many women who smoke marijuana also use tobacco and alcohol. Smoking marijuana increases the levels of carbon monoxide and carbon dioxide in the blood, which reduces the oxygen supply to the baby. Smoking marijuana during pregnancy can increase the chance of miscarriage, low birth weight, premature births, developmental delays, and behavioral and learning problems.