The opioid agonist tramadol is now available in an oral solution (Qdolo – Athena Bioscience) for management of pain severe enough to require an opioid and for which alternative treatment options are inadequate. Tramadol has been available for years in immediate-release tablets and capsules, extended-release capsules (Ultram, and others), and in a fixed-dose combination tablet with acetaminophen (Ultracet, and generics).

The FDA has approved pitolisant (Wakix – Harmony), a histamine-3 (H₃)-receptor antagonist/inverse agonist, for treatment of excessive daytime sleepiness (EDS) or cataplexy in adults with narcolepsy. It is the first H₃-receptor antagonist/inverse agonist to become available in the US and the first non-controlled substance to receive FDA approval for these indications. Pitolisant has been available in Europe since 2016.

Results from a double-blind trial suggest that off-label use of the oral antihyperglycemic drug metformin in patients with COVID-19 may decrease the risk of post-acute sequelae of SARS-CoV-2 infection ("long COVID").

An oral nonopioid analgesic is often sufficient for acute treatment of mild to moderate migraine pain without severe nausea or vomiting. A triptan is the drug of choice for treatment of moderate to severe migraine in most patients without vascular disease. Treatment of pain when it is still mild to moderate in intensity improves headache response and reduces the risk of recurrence.

Alzheimer's disease (AD) is the most common cause of dementia, but cognitive decline is also associated with other neurological conditions such as Parkinson's disease, dementia with Lewy bodies, vascular dementia, and frontotemporal dementia.

The FDA has approved Duaklir Pressair (Circassia), a fixed-dose combination of the long-acting muscarinic antagonist (LAMA) aclidinium bromide and the longacting beta₂-adrenergic agonist (LABA) formoterol fumarate, for maintenance treatment of chronic obstructive pulmonary disease (COPD). Aclidinium/formoterol is the fifth LAMA/LABA combination to be approved in the US for this indication.

The motor symptoms of Parkinson's disease (PD) are caused primarily by degeneration of dopaminergic neurons in the substantia nigra. The nonmotor symptoms of the disease are thought to be caused by degeneration of other neurotransmitter systems. No disease-modifying drugs are available for treatment of PD.

Oliceridine (Olinvyk - Trevena), an IV opioid agonist, has been approved by the FDA for management of acute pain severe enough to require an opioid and for which alternative treatment options are inadequate.

The FDA has approved a long-acting fixed-dose combination of the stimulant dexmethylphenidate and the prodrug serdexmethylphenidate (Azstarys – Corium) for once-daily treatment of attention-deficit/hyperactivity disorder (ADHD) in patients ≥6 years old. Azstarys is the first product containing serdexmethylphenidate to become available in the US.

View the Comparison Table: Some FDA-Approved Drugs for Weight Management