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Related Concept Videos

Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment01:08

Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment

Hepatic impairment, characterized by decreased liver function, does not uniformly mandate adjustments in drug dosage. Whether dosage modifications are necessary depends on various factors related to the drug's metabolism and elimination pathways. If a drug is primarily excreted via the kidneys and bypasses significant hepatic processing, if it undergoes minimal metabolic transformation in the liver, or if it is volatile and primarily expelled through the lungs, dose adjustments may not be...
Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors01:28

Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors

Phosphodiesterase 5 (PDE5) inhibitors are potent enzymes that function to hydrolyze cyclic nucleotides to their corresponding 5' monophosphates. Their unique biochemical properties have been applied in treating Pulmonary Arterial Hypertension (PAH).
Among the PDE5 inhibitors, sildenafil (Revatio) stands out as a competitive and selective inhibitor. It operates by elevating cellular levels of cGMP and augmenting signaling through the cGMP-PKG pathway, promoting vasodilation. Upon oral...
Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...
Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
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Adrenergic Receptors: ɑ Subtype01:31

Adrenergic Receptors: ɑ Subtype

Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
Adrenaline ≥ Noradrenaline >> Isoprenaline
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Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers01:22

Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers

α-Adrenergic antagonists, known as α-blockers, exert their effects by inhibiting α-adrenoceptors, leading to specific physiological actions. α1-blockers and α2-blockers have distinct pharmacological actions and therapeutic applications.
α1-blockers: These drugs inhibit α1-adrenoceptors on smooth muscle cells, resulting in vasodilation. This vasodilation lowers blood pressure, making α1-blockers valuable in treating hypertension. Additionally, α1-blockers effectively address urinary obstruction...

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Related Experiment Video

Updated: Jul 11, 2026

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents
08:03

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents

Published on: June 6, 2018

[Apomorphine and erectile dysfunction].

Da-qing Tan1, Yi Yao, Jie Zhang

  • 1Department of Urology, Renmin Hospital of Wuhan University, Wuhan , Hubei 430060, China.

Zhonghua Nan Ke Xue = National Journal of Andrology
|October 13, 2007
PubMed
Summary
This summary is machine-generated.

Apomorphine, a dopamine agonist, offers a new treatment for erectile dysfunction (ED) via sublingual administration. This review covers its mechanism, efficacy, and safety, noting it

Related Experiment Videos

Last Updated: Jul 11, 2026

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents
08:03

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents

Published on: June 6, 2018

Area of Science:

  • Andrology
  • Pharmacology
  • Urology

Context:

  • Erectile dysfunction (ED) is a prevalent condition affecting male sexual health.
  • Current treatment guidelines primarily recommend oral medications as the initial therapeutic approach.
  • Apomorphine represents a distinct pharmacological option for managing ED.

Purpose:

  • To review the pharmacodynamics and mechanism of action of apomorphine in treating erectile dysfunction.
  • To evaluate the efficacy and safety profile of sublingual apomorphine.
  • To highlight apomorphine's suitability for patients with coronary artery disease on nitrate therapy.

Summary:

  • Apomorphine, a dopamine agonist, targets central pathways regulating penile erection.
  • Sublingual administration of apomorphine facilitates a rapid therapeutic response.
  • Unlike some oral agents, apomorphine is safe for patients using nitrate medications for cardiac conditions.

Impact:

  • Provides a comprehensive overview of apomorphine for clinicians and researchers in andrology and urology.
  • Offers insights into an alternative ED treatment option with a favorable safety profile in specific patient populations.
  • Contributes to the understanding of central mechanisms in erectile function and pharmacological interventions.