Revefenacin Pharmacology Podcast

Revefenacin (brand name Yupelri) is a long-acting muscarinic antagonist (LAMA) used for the maintenance treatment of chronic obstructive pulmonary disease (COPD). It works by blocking muscarinic receptors, particularly the M3 subtype, in airway smooth muscle. This antagonism reduces cholinergic bronchoconstriction and leads to sustained bronchodilation. Unlike short-acting anticholinergics such as ipratropium, revefenacin provides 24-hour bronchodilation with once-daily dosing.

One of the distinguishing features of revefenacin is that it is the first nebulized LAMA approved for COPD maintenance therapy. Many patients with advanced COPD, physical limitations, or difficulty using handheld inhalers benefit from a nebulized formulation, as it allows medication delivery without requiring hand-breath coordination or a forceful inhalation. This makes it a useful option for patients with poor inhaler technique or those transitioning from hospital care.

Pharmacokinetically, revefenacin is delivered via nebulization, with peak effects typically observed within a couple of hours. Importantly, systemic absorption is relatively low, but elderly patients or those with hepatic impairment may be more susceptible to anticholinergic side effects.

Clinically, revefenacin improves lung function, reduces COPD symptoms, and can decrease exacerbation frequency. Common adverse effects include cough, dry mouth, constipation, and urinary retention. Caution is advised in patients with narrow-angle glaucoma or prostatic hyperplasia due to its antimuscarinic properties. Revefenacin is not intended for acute bronchospasm or rescue therapy—it is strictly for long-term, once-daily maintenance.

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Inhaled Budesonide Pharmacology

On this episode of the podcast, I cover budesonide (Pulmicort) pharmacology. Our sponsor (Pyrls.com/rlp) for this episode is providing a FREE PDF of their inhaled corticosteroid categorizations chart (i.e. low/medium/high dose ICS) when you sign up for a free account!

The onset of action of inhaled budesonide is several hours up to a few days. Patient education is critical to ensure that patients stick with its use.

Budesonide does have a nebulized formulation that is often used in pediatrics and geriatrics.

There aren’t a ton of critical drug interactions, but you should think about medications that inhibit CYP3A4 and may have additive immunosuppressive effects.

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Salmeterol (Serevent) Pharmacology

In this episode, I cover salmeterol (Serevent) pharmacology, adverse effects, drug interactions and special warnings with this medication.

Salmeterol is a long acting beta agonist that can be used in combination with inhaled corticosteroids for management of asthma.

Salmeterol can be used as monotherapy in COPD and should not be used as monotherapy in asthma.

Elevations in pulse and blood pressure can happen with a beta agonist like salmeterol.

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Umeclidinium Pharmacology

On this episode, I discuss umeclidinium pharmacology, adverse effects, patient education pearls, and drug interactions.

Umeclidinium is used in the management of COPD. Below is an excellent quick overview of the COPD guidelines from pyrls.com – You can get the full PDF by signing up for a free account at pryls.com/rlp

Umeclidinium is a long-acting anticholinergic (anti-muscarinic) LAMA and as you can see from the figure above drugs from this class are frequently used in COPD management.

The brand name of umeclidinium is Incruse Ellipta. Ellipta refers to the device and not the drug umeclidinium.

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Budesonide Formoterol Pharmacology

Budesonide and Formoterol Pharmacology

Budesonide/formoterol inhalation is sold under the brand name Symbicort.

Budesonide/formoterol is a combination agent that is used in the management of COPD and asthma.

Budesonide/formoterol is a combination of an inhaled corticosteroid and long-acting beta-agonist.

GINA guidelines now allow for the use of budesonide/formoterol in the management of acute asthma exacerbation.

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