As the number of nursing mothers continues to increase, so does the use of drugs, both legal and recreational. Here's what you need to know about drugs and how they affect breastmilk. Read the first part of this article here.

Anne Smith, IBCLC

The tricyclic antidepressants (such as Trofanil and Pamelor) appear in milk in very small amounts, but they take several weeks to start working and many mothers have troubling side effects. According to Dr Hale (Medications and Mother's Milk, 2000) "...many studies show minimal to no effect of the tricyclics on infants..." Wellbutrin (Zyban) is an older antidepressant that has a different structure from SSRI and tricyclic medications. It may appear in milk, but the amount is so low that it is unlikely to cause problems in the breastfed baby. It is often used to help with smoking cessation.

The herbal preparation St John's Wort is currently being studied extensively, but there is not as much information about its effect on breastfeeding as there is about the prescription antibiotics. Because there is more information available about these other medications, it is suggested that they be used during lactation rather than St. John's Wort. Use of this herb is not recommended during pregnancy.

There are some prescription drugs which should never be taken during breastfeeding. These include Bromocriptine (also called Parlodel -- this used to be given to formula feeding mothers soon after birth to dry up their milk, but was discontinued due to side effects); Ergotamine (used to treat migraines), and Cyclosporine, Cyclophosphamide, Methotrexate and Doxorubicin, used to treat cancer or organ transplant rejection.

There are some "recreational drugs" that should not be used at all, or used only in moderation while you are nursing. These include alcohol, caffeine, nicotine, marijuana, cocaine, heroin, hallucinogens and amphetamines. With cocaine, heroin, PCP (angel dust) and LSD, the data is clear: they should never, EVER be used by nursing mothers, even in small doses. They can and do cause serious medical problems in you and your baby. If you must abuse these drugs, don't nurse your baby -- and get some help.

Although ideally, all nursing mothers would be drug-free all the time, the reality is that many mothers will smoke cigarettes, drink alcohol or coffee, toke on a joint or take uppers occasionally. These drugs are so prevalent that it is worth addressing their use. We get back to that risk/benefit thing we discussed earlier. We know the benefits of breastfeeding versus the risks of formula feeding. Although none of the drugs mentioned above are good for you or your baby, there is no evidence of serious harm, especially when used in moderation.

When it comes to smoking, avoid having the baby breathe second-hand smoke of any kind. Nicotine in large doses can cause low milk supply, poor let-down reflex and intestinal upsets in the baby. If you can't quit, smoke after you nurse, don't smoke around the baby and cut down as much as you can. If you smoke fewer than a half a pack a day, the risks to the baby are small. The fewer cigarettes you smoke, the smaller the chance that you will encounter problems.

Marijuana is the most commonly used illegal drug among nursing mothers. The active ingredient, THC, is concentrated in human milk and may make your baby sleepy. Inhaling passive smoke increases the amount he absorbs. As with nicotine, exposing your baby to second-hand smoke increases the amount of the drug he receives. There is one study that found an exposure to marijuana through mother's milk was associated with decreased motor development at one year. (Ashley & Little, 1990) Because there is little evidence of real harm, it is probably better to continue nursing if you smoke pot occasionally than to wean and deprive the baby of the protective benefits of breastfeeding.

Alcohol gets into your milk quickly, but is also diluted relatively quickly by the water in the baby's body. Alcohol ingestion can decrease your milk supply, and may delay your baby's motor development, especially if you drink large amounts on a regular basis. There no evidence that alcohol consumption in moderation poses a serious risk for your baby.

A glass of wine with dinner, or an occasional couple of beers shouldn't make you feel guilty. If you want to be conservative, wait at least two hours for every drink you consume before you nurse your baby. This means that if you want to go out and celebrate your anniversary and really blow it out, you nurse the baby before you leave, feed him expressed milk or formula during the night, have several drinks and then start nursing again in the morning.

Some recommendations on limiting alcohol intake

  1. Use expressed milk to feed if needed after drinking
  2. Eat before and while drinking to minimize the alcohol absorption
  3. Drink Slowly. Sip your drinks and space them two to three hours apart.
  4. Choose drinks low in alcohol, or diluted with water or juice (such as champagne punch, 3 ounces port or vermouth, 5 ounces of beer or wine).
  5. Factor in your baby's age. Infants under four weeks of age detoxify alcohol at a lower rate than babies over three months, due to liver maturation, and preemies' livers are less mature than full-term babies. As with any drug, you need to be more conservative if you are nursing or pumping milk for a tiny preemie or newborn than if you are breastfeeding an older, more mature baby (six to 12 months).

The caffeine in five or less cups of coffee each day will not cause a problem for most nursing mothers and babies. If you consume more than that, some babies will be fussy and over-stimulated. Some babies and mothers are more sensitive to caffeine than others. If you think it's causing a problem, try substituting decaf products for a couple of weeks and see if it makes a difference.

When you use amphetamines in the usual prescription doses, they are compatible with nursing. If you abuse them, they can accumulate in your milk, but even then normally don't cause problems for the baby. Symptoms in the baby with amphetamine abuse may include irritability and sleeplessness -- so don't take more than the doctor recommends.

Most drugs, including chocolate (yes, it's kind of a drug) and herbal preparations are safe when taken in moderation. Keep this in mind while you are nursing. No, you don't have to be Mother Teresa and give up all your vices. Yes, you do have to exercise common sense and self control and make some sacrifices for this new little person in your life -- but not as many as you had to make while you were pregnant.PregnancyAndBaby.com

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