Drug Interactions with Dapoxetine and Tadalafil Combination

These plasma samples were then analyzed using liquid chromatography-tandem mass spectrometry. The results showed that dapoxetine does not alter the pharmacokinetics of tadalafil or sildenafil.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Tadalafil has been classified by the US FDA as Pregnancy Category B. Dapoxetine Hydrochloride has been classified by the US FDA as Pregnancy Category C. Tadalafil Dapoxetine tablets are not indicated for use by women. There is no evidence to suggest that Dapoxetine Hydrochloride exposure has an effect on a partner's pregnancy based on limited observational data obtained from the clinical trial database. There are no adequate and well-controlled studies of Tadalafil or Dapoxetine conducted in pregnant women.

Phosphodiesterase 5 inhibitors

Dapoxetine, sold under the brand name Priligy among others, is a selective serotonin reuptake inhibitor (SSRI) used for the treatment of premature ejaculation (PE) in men ages 18 to 64 years old. [3][4][5] Dapoxetine works by inhibiting the serotonin transporter, increasing serotonin's action at the postsynaptic cleft, and as a consequence promoting ejaculatory delay. [6] As a member of the SSRI family, dapoxetine was initially created as an antidepressant. However, unlike other SSRIs, dapoxetine is absorbed and eliminated rapidly in the body. Its fast-acting property makes it suitable for the treatment of PE, but not as an antidepressant. Alcohol does not affect the pharmacokinetics of dapoxetine when taking concurrently.

Product	Dosage	Quantity + Bonus	Price
Priligy Generic Dapoxetine	60mg	30 + 6 Pills	106.65€ 101.57€	Buy
Kamagra Oral Jelly	100 mg	90 + 8 Sachets	303.56€ 289.10€	Buy
Priligy Generic Dapoxetine	60mg	90 + 10 Pills	265.64€ 252.99€	Buy
Priligy Generic Dapoxetine	60mg	180 + 10 Pills	494.76€ 471.20€	Buy
Priligy Generic Dapoxetine	60mg	10 Pills	47.63€ 45.36€	Buy
Priligy Generic Dapoxetine	60mg	60 + 8 Pills	183.06€ 174.34€	Buy
Cialis Black	80mg	360 + 20 Pills	639.78€ 609.31€	Buy
Priligy Generic Dapoxetine	60mg	20 + 4 Pills	77.31€ 73.63€	Buy
Priligy Generic Dapoxetine	60mg	120 + 10 Pills	341.26€ 325.01€	Buy
Cialis Super Active	20mg	180 + 20 Pills	521.59€ 496.75€	Buy

The mechanism through which dapoxetine affects premature ejaculation is still unclear, but dapoxetine is presumed to work by inhibiting serotonin transporter (SERT) and subsequently increasing serotonin's action at pre- and postsynaptic receptors.

• Sexual health clinics often provide comprehensive assessments for combined therapy.
• Educational materials support patient understanding of benefits and risks.
• Regular assessment of sexual function helps track treatment progress.
• Partner involvement can enhance therapeutic success.
• Counselling reduces psychological barriers to treatment adherence.
• Multidisciplinary approach may include urologists, psychologists, and pharmacists.
• Keeping detailed medical history improves personalized care.
• Awareness of cultural sensitivities improves patient communication.
• Support groups can provide additional coping resources for affected men.

[22] Human ejaculation is regulated by various areas in the central nervous system (CNS). These signals are passed on to the brain stem, which then is influenced by a number of nuclei in the brain such as medial preoptic and paraventricular nuclei.

Direction to Use

Waldinger's meta-analysis shows that the use of these conventional antidepressants increases IELT two- to nine-fold above baseline, compared to three- to eight-fold when dapoxetine is used. [11] However, these SSRIs may need to be taken daily to achieve meaningful efficacy, and their comparatively longer half-lives sildenafil dapoxetine tablets increase the risk of drug accumulation and a corresponding increase of adverse effects such as reduced libido. [13] Dapoxetine, though, is generally categorized as a fast-acting SSRI. It is more rapidly absorbed and mostly eliminated from the body within a few hours. These pharmacokinetics are more favorable in that they might minimize drug accumulation in the body, habituation, and side effects.

Chemical Names

Dapoxetine was initially considered unsuccessful in its intended use as an antidepressant; however, it has since been investigated as a possible aid to an approach to depression treatment focused on stress reduction, based on an animal model of depression. Dapoxetine should not be used in men with moderate to severe hepatic impairment and in those receiving CYP3A4 inhibitors such as ketoconazole, ritonavir, and telithromycin. Dapoxetine also cannot be used in patients with heart failure, permanent pacemaker, or other significant ischemic heart disease. Caution is advised in men receiving thioridazine, monoamine oxidase inhibitors, SSRIs, serotonin-norepinephrine reuptake inhibitors, or tricyclic antidepressants. If a patient stops taking one of these drugs, he should wait for 14 days before taking dapoxetine. [24] Clement's study performed on anaesthetized male rats showed that acute administration of dapoxetine inhibits ejaculatory expulsion reflex at supraspinal level by modulating activity of lateral paragigantocellular nucleus (LPGi) neurons. These effects cause an increase in pudendal motoneuron reflex discharge (PMRD) latency, though whether dapoxetine acts directly on LPGi or on the descending pathway in which LPGi located is unclear.

Key Benefits

Originally created by Eli Lilly pharmaceutical company, dapoxetine was sold to Johnson & Johnson in 2003 and submitted as a New Drug Application to the US Food and Drug Administration (FDA) for the treatment of PE in 2004. [8] Dapoxetine is sold in several European and Asian countries, and in Mexico. In the US, dapoxetine has been in phase III development. In May 2012, US-based Furiex Pharmaceuticals reached an agreement with ALZA Corp and Janssen Pharmaceuticals to market dapoxetine in the United States, Japan, and Canada, while selling the rights to market the drug in Europe, most of Asia, Africa, Latin America, and the Middle East to Menarini. Randomized, double-blind, placebo-controlled trials have confirmed the efficacy of dapoxetine for the treatment of PE.

Depression and anxiety

[10] Different dosages have different impacts on different types of PE. Dapoxetine 60 mg significantly improves the mean intravaginal ejaculation latency time (IELT) compared to that of dapoxetine 30 mg in men with lifelong PE, but no difference is seen in men with acquired PE. [11] Dapoxetine, given 1–3 hours before sexual episode, prolongs IELT and increases the sense of control and sexual satisfaction in men of 18 to 64 years of age with PE. Since PE is associated with personal distress and interrelationship difficulty, dapoxetine provides help for men with PE to overcome this condition. With no drug approved specifically for treatment for PE in the US and some other countries, other SSRIs such as fluoxetine, paroxetine, sertraline, fluvoxamine, and citalopram have been used off-label to treat PE. Dapoxetine is a white, powdery, water-insoluble substance. Taken one to three hours before sexual activity, it is rapidly absorbed in the body.

Parameter	Dapoxetine	Tadalafil
Absorption	Rapid; peak in 1-3 hours	Peak in 2 hours
Bioavailability	Approximately 54%	About 84%
Metabolism	Liver via CYP2D6 & CYP3A4	Liver via CYP3A4
Half-life	1-1.5 hours	17.5 hours
Excretion	Urine and feces	Mainly feces

Its maximum plasma concentration (Cmax) is reached one to two hours after oral administration.

• Psychological effects include reduced anxiety and improved sexual satisfaction.
• Effectiveness may vary depending on individual health status and age.
• Dapoxetine's effect on ejaculation delay is usually up to 2-3 hours.
• Tadalafil improves erectile function allowing for more spontaneous activity.
• Patients should report any prolonged erection lasting over 4 hours immediately.
• Sexual stimulation is necessary for tadalafil to work effectively.
• Avoid grapefruit juice which can interfere with drug metabolism.
• Regular follow-up helps in adjusting dosage and monitoring side effects.
• Combining these tablets should not be confused with aphrodisiac or recreational use.

The Cmax and AUC (area under the plasma vs.

Drug Interactions

The common side effects include headache, dyspepsia, back pain, myalgia, nasal congestion, flushing, nausea, dizziness, diarrhoea, insomnia,fatigue and pain in limb. © Clearsky Pharmacy TadalafilDapoxetine Tablets to treat Erectile Dysfunction and Premature Ejaculation at the Same Time Tadalafil Dapoxetine Tablets Overdose Single doses up to 500 mg of Tadalafil have been given to healthy subjects, and multiple daily doses up to 100 mg have been given to patients. Adverse events were similar to those seen at lower doses. In cases of overdose, standard supportive measures should be adopted as required. © Clearsky Pharmacy TadalafilDapoxetine Tablets to treat Erectile Dysfunction and Premature Ejaculation at the Same Time Tadalafil Dapoxetine Tablets Overdose No case of Dapoxetine overdose has been reported.

Generic Names

There were no unexpected adverse events in a clinical pharmacology study of Dapoxetine with daily doses up to 240 mg (two 120 mg doses given 3 hours apart). In general, symptoms of overdose with SSRIs include serotonin-mediated adverse reactions such as somnolence, gastrointestinal disturbances such as nausea and vomiting, tachycardia, tremor, agitation and dizziness. Due to high protein binding and large volume of distribution of Dapoxetine Hydrochloride, forced diuresis, dialysis, hemoperfusion and exchange transfusion are unlikely to be of benefit. No specific antidotes for Dapoxetine are known. © Clearsky Pharmacy TadalafilDapoxetine Tablets to treat Erectile Dysfunction and Premature Ejaculation at the Same Time Tadalafil Dapoxetine Tablets During Pregnancy This is a combination medication containing Tadalafil and Dapoxetine Hydrochloride. time curve) is dose dependent. The Cmax and Tm (time needed to obtain the maximum plasma concentration) after single doses of dapoxetine 30 mg and 60 mg are 297 and 498 ng/ml at 1.01 and 1.27 hours, respectively.

Effect Parameter	Dapoxetine	Tadalafil
Onset of Action	Within 1 hour	Within 30 minutes to 2 hours
Duration of Effect	About 3 hours	Up to 36 hours
Success Rate in Erectile Dysfunction	Low (not primary use)	High (75-80%)
Success Rate in Premature Ejaculation	High	Not effective for this purpose

A high-fat meal does reduce the Cmax slightly, but it is insignificant. It can be taken with or without food.

Cited by (30)

No case of drug overdose has been reported during clinical trials. Many men who have PE also suffer from erectile dysfunction (ED). Treatment for these patients should consider the drug–drug interaction between dapoxetine and PDE5 inhibitors such as tadalafil (Cialis) or sildenafil (Viagra). In Dresser study (2006), plasma concentration of 24 subjects was obtained. Half of the sample pool were treated with dapoxetine 60 mg plus tadalafil 20 mg; the other half were treated with dapoxetine 60 mg plus sildenafil 100 mg. Dapoxetine is absorbed and distributed rapidly in the body. The mean steady-state volume is 162 L.

• Pharmacies may offer generic combo packs tailored for dual therapy needs.
• Insurance plans vary widely in coverage for these medications.
• Cost-effectiveness is a factor in treatment choice for many patients.
• Patient assistance programs may be available for those with financial barriers.
• Bulk purchasing can reduce overall treatment costs.
• Online telehealth can facilitate easier access to prescriptions.
• Awareness campaigns promote understanding of sexual health treatment options.
• Privacy concerns addressed with discreet packaging and delivery services.
• Pharmacists play a key role in patient education about dapoxetine and tadalafil.

Its initial half-life is 1.31 hours (30 mg dose) and 1.42 hours (60 mg dose), and its terminal half life is 18.7 hours (30 mg dose) and 21.9 hours (60 mg dose). Dapoxetine is metabolized extensively in the liver and kidney by multiple enzymes such as CYP2D6, CYP3A4, and flavin monooxygenase 1. The major product at the end of the metabolic pathway is circulating dapoxetine N-oxide, which is a weak SSRI and contributes no clinical effect.

Medication Class	Interaction Type	Potential Effect	Notes
CYP3A4 inhibitors	Increased drug levels	Higher risk of side effects	e.g., ketoconazole, ritonavir
Nitrates	Severe hypotension	Dangerous blood pressure drop	Contraindicated
Alcohol	Increased sedation	Dizziness, hypotension	Use with caution
Antihypertensive medications	Additive blood pressure lowering	Risk of hypotension	Monitor blood pressure

The metabolites of dapoxetine are eliminated rapidly in the urine with a terminal half-life of 18.7 and 21.9 hours for a single dose of 30 mg and 60 mg, respectively. The cardiovascular safety profile of dapoxetine has been studied extensively during the drug development.

What does Priligy do to your body?

If a patient stops taking dapoxetine, he should wait for 7 days before receiving these drugs. The most common effects when taking dapoxetine are nausea, dizziness, dry mouth, headache, diarrhea, and insomnia. [16][17] Discontinuation rates due to adverse effects and costs are very high, as demonstrated in a study in Asia which showed that cumulative discontinuation rates within one year are as high as 87%. [18] Unlike other SSRIs used to treat depression, which have been associated with high incidences of sexual dysfunction,[19] dapoxetine is associated with low rates of sexual dysfunction. Taken as needed, dapoxetine has very mild adverse effects of decreased libido (<1%) and erectile dysfunction (<4%). Phase I trials showed that dapoxetine had neither clinically significant electrocardiographic effects nor delayed repolarization effects, with dosing up to four-fold greater than the maximum recommended dosage, which is 60 mg.

• Generic versions of dapoxetine and tadalafil are widely available globally.
• Brand names include Priligy for dapoxetine and Cialis for tadalafil.
• These medications are often obtained via prescription to ensure safe usage.
• Patient education enhances adherence to therapy and reduces misuse risk.
• Clinical trials support these drugs’ dual use for improved sexual health outcomes.
• Cost and insurance coverage vary by region and provider.
• Some online pharmacies require doctor consultation before purchase.
• Over-the-counter availability is generally illegal and unsafe.
• Beware of counterfeit products when purchasing from unregulated sources.