The FDA has approved raxibacumab (rax” ee bak’ ue mab; GSK), a fully human monoclonal antibody given by intravenous infusion, for treatment of inhalational anthrax in combination with appropriate antibacterial drugs, and for prophylaxis of inhalational anthrax when alternative therapies are not available or are not appropriate. It was approved under the Animal Efficacy Rule, which allows the FDA to approve drugs that demonstrate efficacy in animals, providing that they would have a reasonable human health benefit and are safe for human use. Raxibacumab is only available from the...

Icosapent ethyl (Vascepa [vas EE puh] – Amarin), the ethyl ester of eicosapentaenoic acid (EPA), has been approved by the FDA as an adjunct to diet for treatment of severe hypertriglyceridemia (≥500 mg/dL). Vascepa is the second omega-3 polyunsaturated fatty acid (PUFA) product to become available by prescription for this indication; Lovaza (formerly Omacor), which is a combination of the ethyl esters of EPA and docosahexaenoic acid (DHA), was the first. Many omega-3 PUFA-containing fish oil capsules are sold over the counter as dietary supplements.

The FDA has approved the somatostatin analog pasireotide diaspartate (Signifor – Novartis) for treatment of adults with Cushing's disease (cortisol excess caused by an ACTH-secreting pituitary tumor) who are not candidates for pituitary surgery or for whom surgery has not been curative. Pasireotide is the first drug approved in the US specifically to treat Cushing's disease. The antiprogestin mifepristone (Korlym) was approved last year for control of hyperglycemia in patients with Cushing's syndrome, which includes other causes of hypercortisolism, such as exogenous steroids and...

The FDA has approved use of lubiprostone (Amitiza) for treatment of opioid-induced constipation in adults with chronic non-cancer pain. The drug was previously approved for chronic idiopathic constipation and irritable bowel syndrome with constipation.

The FDA has approved the melatonin receptor agonist tasimelteon (Hetlioz – Vanda) for treatment of non-24-hour sleep-wake disorder (non-24), which is common in totally blind persons. Tasimelteon is the first drug approved for this indication and the second melatonin receptor agonist approved for use in the US; ramelteon (Rozerem) was approved earlier for treatment of insomnia. Melatonin itself has not been approved by the FDA for any indication; it is available in the US as a dietary supplement and is promoted as a sleep aid.

Apremilast (Otezla – Celgene), an oral phosphodiesterase type-4 (PDE4) inhibitor, has been approved by the FDA for treatment of active psoriatic arthritis in adults. It is the fi rst PDE4 inhibitor to be approved for this indication.

Eslicarbazepine acetate (Aptiom – Sunovion) has been approved by the FDA for adjunctive treatment of partial-onset seizures in adults. New drugs for epilepsy are often approved by the FDA initially only as adjunctive treatment for partial seizures. Eslicarbazepine acetate is a prodrug of eslicarbazepine, which is the S-isomer of the active metabolite of oxcarbazepine. Oxcarbazepine itself is similar to carbamazepine. Both oxcarbazepine and carbamazepine are available generically.

Most patients with end-stage renal disease develop hyperphosphatemia, which can lead to secondary hyperparathyroidism, vascular calcification, and cardiovascular mortality. The FDA has approved sucroferric oxyhydroxide (Velphoro – Fresenius Medical Care), a chewable phosphate binder, for treatment of hyperphosphatemia in patients with chronic kidney disease (CKD) on dialysis. It is the first iron-based phosphate binder to be approved for this indication.

The FDA has approved omacetaxine mepesuccinate (Synribo – Teva), a cephalotaxine known for many years as homoharringtonine, for treatment of adults with chronic or accelerated phase chronic myeloid leukemia (CML) who are no longer responding to, or who could not tolerate, two or more tyrosine kinase inhibitors.

Palbociclib (Ibrance – Pfizer), an oral cyclin-dependent kinase inhibitor, has been approved by the FDA for use in combination with the aromatase inhibitor letrozole (Femara, and generics) for first-line treatment of postmenopausal women with estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER2)-negative metastatic breast cancer. It is the first cyclin-dependent kinase inhibitor to become available in the US.