ADVERSE REACTIONS
Metoprolol — A study was conducted to assess the interaction of sustained-release metoprolol (25 to 200 mg daily) and tadalafil 10 mg.
| Parameter | Value | Details |
|---|---|---|
| Absorption | Rapid, within 30-120 minutes | Food intake can delay absorption |
| Bioavailability | ~40% | Fraction of dose that enters circulation |
| Metabolism | Liver (CYP3A4 enzyme) | Enzymatic processing |
| Half-life | ~17.5 hours | Duration of action in the body |
| Excretion | Feces (~61%), Urine (~36%) | Mainly via hepatic pathways |
Following dosing, the mean reduction in supine systolic/diastolic blood pressure due to tadalafil 10 mg in subjects taking metoprolol was 5/3 mm Hg, compared to placebo.
7.2 Potential for Other Drugs to Affect CIALIS
There was no effect of tadalafil on amlodipine blood levels and no effect of amlodipine on tadalafil blood levels. The mean reduction in supine systolic/diastolic blood pressure due to tadalafil 10 mg in subjects taking amlodipine was 3/2 mm Hg, compared to placebo. In a similar study using tadalafil 20 mg, there were no clinically significant differences between tadalafil and placebo in subjects taking amlodipine. Angiotensin II receptor blockers (with and without other antihypertensives) cialis much cost — A study was conducted to assess the interaction of angiotensin II receptor blockers and tadalafil 20 mg. Subjects in the study were taking any marketed angiotensin II receptor blocker, either alone, as a component of a combination product, or as part of a multiple antihypertensive regimen.
5.6 Alpha-blockers and Antihypertensives
Following dosing, ambulatory measurements of blood pressure revealed differences between tadalafil and placebo of 8/4 mm Hg in systolic/diastolic blood pressure. Bendrofluazide — A study was conducted to assess the interaction of bendrofluazide (2.5 mg daily) and tadalafil 10 mg. Following dosing, the mean reduction in supine systolic/diastolic blood pressure due to tadalafil 10 mg in subjects taking bendrofluazide was 6/4 mm Hg, compared to placebo. Enalapril — A study was conducted to assess the interaction of enalapril (10 to 20 mg daily) and tadalafil 10 mg. Following dosing, the mean reduction in supine systolic/diastolic blood pressure due to tadalafil 10 mg in subjects taking enalapril was 4/1 mm Hg, compared to placebo. Effects on Blood Pressure When Administered with Alcohol Alcohol and PDE5 inhibitors, including tadalafil, are mild systemic vasodilators.
| Attribute | Description | Notes |
|---|---|---|
| Generic Name | Tadalafil | Main active ingredient |
| Brand Name | Cialis (by Lilly) | Commercial name |
| Dosage Forms | Tablets, oral | Available forms |
| Typical Dose | 5 mg, 10 mg, 20 mg | Varies per prescription |
| Onset of Action | 30-60 minutes | Time to effect |
| Duration of Effect | Up to 36 hours | Pharmacological window |
The interaction of tadalafil with alcohol was evaluated in 3 clinical pharmacology studies.
- Cialis has been studied in combination with other ED treatments.
- Research explores effects of Cialis on other vascular diseases.
- The medication’s development highlighted the role of enzyme PDE5.
- Side effect profiles are monitored in post-marketing surveillance.
- Cialis is included in many guidelines as a first-line ED therapy.
- The drug is contraindicated with certain cardiac medications.
- Cost and accessibility remain concerns for some patients.
- Generic versions have improved affordability worldwide.
- Cialis may improve confidence and emotional well-being.
- Ongoing trials explore new indications beyond ED and BPH.
- Patient adherence to therapy is critical for results.
- Lilly’s commitment to sexual health research continues.
In 2 of these, alcohol was administered at a dose of 0.7 g/kg, which is equivalent to approximately 6 ounces of 80-proof vodka in an 80-kg male, and tadalafil was administered at a dose of 10 mg in one study and 20 mg in another. In both these studies, all patients imbibed the entire alcohol dose within 10 minutes of starting.
- Cialis was approved by the European Medicines Agency (EMA).
- It is widely available in pharmacies and hospitals.
- Cialis’s trademark is owned by Eli Lilly and Company.
- Generic tadalafil requires prescribed substitution where allowed.
- Lilly offers risk management programs for Cialis use.
- Insurance coverage for Cialis varies by country and plan.
- Cialis is not suitable for females and children.
- Studies show Cialis maintains efficacy with chronic use.
- Lilly invested in advertising campaigns emphasizing Cialis’s long action.
- The company collaborates with healthcare providers for education.
- Cialis’s sales contribute significantly to Lilly’s revenue.
- Scientific journals publish continuous data on Cialis’s effectiveness.
In one of these two studies, blood alcohol levels of 0.08% were confirmed. In these two studies, more patients had clinically significant decreases in blood pressure on the combination of tadalafil and alcohol as compared to alcohol alone.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Cialis Generic | 60mg | 20 Pills | 65.61€ 62.49€ | |
| Cialis Original | 20mg | 120 + 8 Pills | 497.29€ 473.61€ | |
| Cialis Generic | 5mg | 120 + 6 Pills | 132.92€ 126.59€ | |
| Cialis Generic | 60mg | 360 + 10 Pills | 570.52€ 543.35€ | |
| Cialis Super Active | 20mg | 180 + 20 Pills | 521.59€ 496.75€ | |
| Cialis Generic | 5mg | 360 + 10 Pills | 268.08€ 255.31€ | |
| Cialis Generic | 10mg | 270 + 10 Pills | 308.71€ 294.01€ | |
| Cialis Generic | 60mg | 180 + 10 Pills | 313.11€ 298.20€ | |
| Cialis Generic | 20mg | 360 + 10 Pills | 427.34€ 406.99€ | |
| Cialis Black | 80mg | 60 + 4 Pills | 150.98€ 143.79€ | |
| Cialis Generic | 40mg | 270 + 10 Pills | 382.19€ 363.99€ | |
| Cialis Original | 20mg | 8 Pills | 61.70€ 58.76€ | |
| Cialis Generic | 2.5mg | 60 + 4 Pills | 83.43€ 79.46€ |
Some subjects reported postural dizziness, and orthostatic hypotension was observed in some subjects.
17.8 Sudden Hearing Loss
In the third doxazosin study, healthy subjects (N=45 treated; 37 completed) received 28 days of once per day dosing of tadalafil 5 mg or placebo in a two-period crossover design. After 7 days, doxazosin was initiated at 1 mg and titrated up to 4 mg daily over the last 21 days of each period (7 days on 1 mg; 7 days of 2 mg; 7 days of 4 mg doxazosin). The results are shown in Table 7. Blood pressure was measured manually pre-dose at two time points (-30 and -15 minutes) and then at 1, 2, 3, 4, 5, 6, 7, 8, 10, 12 and 24 hours post dose on the first day of each doxazosin dose, (1 mg, 2 mg, 4 mg), as well as on the seventh day of 4 mg doxazosin administration. Following the first dose of doxazosin 1 mg, there were no outliers on tadalafil 5 mg and one outlier on placebo due to a decrease from baseline in standing systolic BP of >30 mm Hg.
17.5 Potential for Drug Interactions When Taking CIALIS for Once Daily Use
There were 2 outliers on tadalafil 5 mg and none on placebo following the first dose of doxazosin 2 mg due to a decrease from baseline in standing systolic BP of >30 mm Hg. There were no outliers on tadalafil 5 mg and two on placebo following the first dose of doxazosin 4 mg due to a decrease from baseline in standing systolic BP of >30 mm Hg. There was one outlier on tadalafil 5 mg and three on placebo following the first dose of doxazosin 4 mg due to standing systolic BP <85 mm Hg. Following the seventh day of doxazosin 4 mg, there were no outliers on tadalafil 5 mg, one subject on placebo had a decrease >30 mm Hg in standing systolic blood pressure, and one subject on placebo had standing systolic blood pressure <85 mm Hg. All adverse events potentially related to blood pressure effects were rated as mild or moderate.
5.11 Combination With Other PDE5 Inhibitors or Erectile Dysfunction Therapies
There were two episodes of syncope in this study, one subject following a dose of tadalafil 5 mg alone, and another subject following coadministration of tadalafil 5 mg and doxazosin 4 mg. Tamsulosin — In the first tamsulosin study, a single oral dose of tadalafil 10, 20 mg, or placebo was administered in a 3 period, crossover design to healthy subjects taking 0.4 mg once per day tamsulosin, a selective alpha[1A]-adrenergic blocker (N=18 subjects). Tadalafil or placebo was administered 2 hours after tamsulosin following a minimum of seven days of tamsulosin dosing. Blood pressure was measured manually at 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, and 24 hours after tadalafil or placebo dosing. There were 2, 2, and 1 outliers (subjects with a decrease from baseline in standing systolic blood pressure of >30 mm Hg at one or more time points) following administration of tadalafil 10 mg, 20 mg, and placebo, respectively. When tadalafil 20 mg was administered with a lower dose of alcohol (0.6 g/kg, which is equivalent to approximately 4 ounces of 80-proof vodka, administered in less than 10 minutes), orthostatic hypotension was not observed, dizziness occurred with similar frequency to alcohol alone, and the hypotensive effects of alcohol were not potentiated.
2. Cialis Dosage and Administration
There were no subjects with a standing systolic blood pressure <85 mm Hg. No severe adverse cialis alternative events potentially related to blood-pressure effects were reported. In the second tamsulosin study, healthy subjects (N=39 treated; and 35 completed) received 14 days of once per day dosing of tadalafil 5 mg or placebo in a two-period crossover design. Daily dosing of tamsulosin 0.4 mg was added for the last seven days of each period. Blood pressure was measured manually pre-dose at two time points (-30 and -15 minutes) and then at 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, and 24 hours post dose on the first, sixth and seventh days of tamsulosin administration.
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There were no outliers (subjects with a decrease from baseline in standing systolic blood pressure of >30 mm Hg at one or more time points). One subject on placebo plus tamsulosin (Day 7) and one subject on tadalafil plus tamsulosin (Day 6) had standing systolic blood pressure <85 mm Hg. No severe adverse events potentially related to blood pressure were reported. Alfuzosin — A single oral dose of tadalafil 20 mg or placebo was administered in a 2-period, crossover design to healthy subjects taking once-daily alfuzosin HCl 10 mg extended-release tablets, an alpha[1]-adrenergic blocker (N=17 completed subjects). Tadalafil or placebo was administered 4 hours after alfuzosin following a minimum of seven days of alfuzosin dosing.
8.4 Pediatric Use
Blood pressure was measured manually at 1, 2, 3, 4, 6, 8, 10, 20, and 24 hours after tadalafil or placebo dosing. There was 1 outlier (subject with a standing systolic blood pressure <85 mm Hg) following administration of tadalafil 20 mg. There were no subjects with a decrease from baseline in standing systolic blood pressure of >30 mm Hg at one or more time points. No severe adverse events potentially related to blood pressure effects were reported. Effects on Blood Pressure When Administered with Antihypertensives Amlodipine — A study was conducted to assess the interaction of amlodipine (5 mg daily) and tadalafil 10 mg. The effects of tadalafil on cardiac function, hemodynamics, and exercise tolerance were investigated in a single clinical pharmacology study.
8.2 Lactation
In part C (N=24), subjects were titrated to doxazosin 8 mg administered daily at 8 a.m. In this part, tadalafil or placebo were administered at either 8 a.m. or 8 p.m. The placebo-subtracted mean maximal decreases in systolic blood pressure over a 12-hour period after dosing in the placebo-controlled portion of the study (part C) are shown in Table 6 and Figure 3. Figure 3: Doxazosin Study 2 (Part C): Mean Change from Time-Matched Baseline in Systolic Blood Pressure Blood pressure was measured by ABPM every 15 to 30 minutes for up to 36 hours after tadalafil or placebo.
Use In Specific Populations
Subjects were categorized as outliers if one or more systolic blood pressure readings of <85 mm Hg were recorded or one or more decreases in systolic blood pressure of >30 mm Hg from a time-matched baseline occurred during the analysis interval. Of the 24 subjects in part C, 16 subjects were categorized as outliers following administration of tadalafil and 6 subjects were categorized as outliers following placebo during the 24-hour period after 8 a.m. dosing of tadalafil or placebo. Of these, 5 and 2 were outliers due to systolic BP <85 mm Hg, while 15 and 4 were outliers due to a decrease from baseline in systolic BP of >30 mm Hg following tadalafil and placebo, respectively. During the 24-hour period after 8 p.m.
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dosing, 17 subjects were categorized as outliers following administration of tadalafil and 7 subjects following placebo. Of these, 10 and 2 subjects were outliers due to systolic BP <85 mm Hg, while 15 and 5 subjects were outliers due to a decrease from baseline in systolic BP of >30 mm Hg, following tadalafil and placebo, respectively. Some additional subjects in both the tadalafil and placebo groups were categorized as outliers in the period beyond 24 hours. In cialis 10mg pills the study (N=72 subjects), 2 such events were reported following administration of tadalafil (symptomatic hypotension in one subject that began 10 hours after dosing and lasted approximately 1 hour, and dizziness in another subject that began 11 hours after dosing and lasted 2 minutes). In the period prior to tadalafil dosing, one severe event (dizziness) was reported in a subject during the doxazosin run-in phase.