Which drug should be avoided for prescription in a lactating mother with heart problems?

The inquiry pertains to the appropriate management of medications in a lactating mother with heart problems. In this context, the selected drug for avoidance, which is also known as Tenormin, is a beta-blocker that can pass into breast milk. While it might be used in certain circumstances for managing heart conditions, it is typically not the first-line choice due to its potential effects on both maternal and infant health.

Atenolol, while sometimes prescribed, presents similar concerns regarding lactation but is generally considered safer as it has been studied more extensively in breastfeeding women. Lanoxin, or digoxin, can be prescribed in lactating women under careful monitoring. Verapamil, a calcium channel blocker, is also reasonably safe for use in breastfeeding but should be used with caution based on the mother's health status and the infant's reaction.

In summary, the reason Tenormin is highlighted as a drug to avoid for prescription in this scenario is due to its potential risks and side effects that could impact the lactating mother and her nursing infant, making it less favorable compared to other available options.