Clonazepam is a terrible choice for postpartum anxiety, especially with drowsiness side effect already occurring, because of its extremely long half-life, whereby it can start accumulating over time, so timing breastfeeding and dosing will not work well.
A much better choice would be buspiron (Buspar), which has much better pharmacokinetics for breastfeeding, especially much shorter half-life.
PS: Freezing does not affect drug potency.
Frank J. Nice, RPh, DPA, CPHP
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