Conjugated Estrogens Pharmacology

Conjugated estrogens (Premarin) are most often used in the management of menopausal symptoms.

Estrogen therapy can increase the risk for breast cancer and the risk should be assessed before beginning therapy.

Blood clots are a potential consequence from the use of Premarin. Premarin can oppose the benefit of anticoagulation.

Conjugated estrogens are broken down by CYP3A4. Inhibitors may increase concentrations while inducers may reduce concentrations.

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Medroxyprogesterone Acetate Injection Pharmacology

On this podcast episode, I cover medroxyprogesterone acetate injection pharmacology (DMPA or Depo-Provera)

Medroxyprogesterone acetate injection is given every three months for the prevention of pregnancy.

Medroxyprogesterone acetate has a boxed warning for its risk of causing low bone mineral density.

Classic enzyme inducers can cause lower concentrations of medroxyprogesterone which can potentially lead to contraceptive failure.

Examples of enzyme inducers that can lower concentrations of medroxyprogesterone include carbamazepine, phenytoin, rifampin, and some agents used in the management of HIV.

Be sure to check out our free Top 200 study guide – a 31 page PDF that is yours for FREE!