14 CLINICAL STUDIES

6.1 Clinical Studies Experience
More about Cialis (tadalafil)
What Are Side Effects Associated with Using Tadalafil (Zovirax)?
14.1 CIALIS for Use as Needed
5.4 Hearing Impairment

(See Animal Toxicology and/or Pharmacology Section 13.2) CIALIS is not indicated for use in women. While tadalafil or some metabolite of tadalafil was excreted into rat milk, drug levels in animal breast milk may not accurately predict levels of drug in human breast milk. Safety and efficacy in patients below the age of 18 years has not been established. Of the total number of subjects in clinical studies of tadalafil, approximately 25 percent were 65 and over, while approximately 3 percent were 75 and over. [See Dosage and Administration (2.3) and Warnings and Precautions (5.8)].

6.1 Clinical Studies Experience

Does Cialis cause any long-term side effects?

In clinical pharmacology studies using single-dose tadalafil (5 to 10 mg), tadalafil exposure (AUC) doubled in subjects with mild (creatinine clearance 51 to 80 mL/min) or moderate (creatinine clearance 31 to 50 mL/min) renal insufficiency. It is a crystalline solid that is practically insoluble in water and very slightly soluble in ethanol.CIALIS is available as film-coated, almond-shaped tablets for oral administration. CIALIS (tadalafil), an oral treatment for erectile dysfunction, is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). CIALIS is available as film-coated, almond-shaped tablets for oral administration. Because sexual stimulation is required to initiate the local release of nitric oxide, the inhibition of PDE5 by tadalafil has no effect in the absence of sexual stimulation.Studies in vitro have demonstrated that tadalafil is a selective inhibitor of PDE5.

Muscle pain

PDE5 is found in corpus cavernosum smooth muscle, vascular and visceral smooth muscle, skeletal muscle, platelets, kidney, lung, cerebellum, and pancreas.In vitro studies have shown that the effect of tadalafil is more potent on PDE5 than on other phosphodiesterases. PDE11 is an enzyme found in human prostate, testes, skeletal muscle and in other tissues. In such circumstances, nitrates should still only be administered under close medical supervision with appropriate hemodynamic monitoring [see Contraindications (4.1)].Effect on Blood Pressure When Administered With Alpha BlockersSix randomized, double-blinded, crossover clinical pharmacology studies were conducted to investigate the potential interaction of tadalafil with alpha-blocker agents in healthy male subjects [see Dosage and Administration (2.4) and Warnings and Precautions (5.6)]. In four studies, a single oral dose of tadalafil was administered to healthy male subjects taking daily (at least 7 days duration) oral alpha blocker. In two studies, daily oral alpha blocker (at least 7 days duration) was administered to healthy male subjects taking repeated daily doses of tadalafil.Doxazosin — Three clinical pharmacology studies were conducted with tadalafil and doxazosin, an alpha[1]-adrenergic blocker.In the first doxazosin study, a single oral dose of tadalafil 20 mg or placebo was administered in a 2-period, crossover design to healthy subjects taking oral doxazosin 8 mg daily (N=18 subjects). In clinical pharmacology studies using single-dose tadalafil (5 to 10 mg), tadalafil exposure (AUC) doubled in subjects with mild (creatinine clearance 51 to 80 mL/min) or moderate (creatinine clearance 31 to 50 mL/min) renal insufficiency. It is a crystalline solid that is practically insoluble in water and very slightly soluble in ethanol.CIALIS is available as film-coated, almond-shaped tablets for oral administration. CIALIS (tadalafil), an oral treatment for erectile dysfunction, is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5).

The future may bring digital tracking (like a QR code) on the pill.
Currently, no such markings exist on brand Cialis tablets.
Any change to its appearance would require regulatory approval.
Patients and doctors would be notified well in advance.
For now, the classic yellow, oval, imprinted tablet remains standard.
Its appearance is a fixed point in a changing pharmaceutical landscape.
As patents expire, the brand appearance retains its recognition.
Generics will continue to use different looks to avoid trademark issues.
The brand pill's appearance is its lasting visual legacy.
It is a simple object that has impacted millions of lives.
Understanding its appearance is part of responsible medication use.

CIALIS is available as film-coated, almond-shaped tablets for oral administration. Because sexual stimulation is required to initiate the local release of nitric oxide, the inhibition of PDE5 by tadalafil has no effect in the absence of sexual stimulation.Studies in vitro have demonstrated that tadalafil is a selective inhibitor of PDE5. PDE5 is found in corpus cavernosum smooth muscle, vascular and visceral smooth muscle, skeletal muscle, platelets, kidney, lung, cerebellum, and pancreas.In vitro studies have shown that the effect of tadalafil is more potent on PDE5 than on other phosphodiesterases. PDE11 is an enzyme found in human prostate, testes, skeletal muscle and in other tissues. In such circumstances, nitrates should still only be administered under close medical supervision with appropriate hemodynamic monitoring [see Contraindications (4.1)].Effect on Blood Pressure When Administered With Alpha BlockersSix randomized, double-blinded, crossover clinical pharmacology studies were conducted to investigate the potential interaction of tadalafil with alpha-blocker agents in healthy male subjects [see Dosage and Administration (2.4) and Warnings and Precautions (5.6)]. In four studies, a single oral dose of tadalafil was administered to healthy male subjects taking daily (at least 7 days duration) oral alpha blocker. In two studies, daily oral alpha blocker (at least 7 days duration) was administered to healthy male subjects taking repeated daily doses of tadalafil.Doxazosin — Three clinical pharmacology studies were conducted with tadalafil and doxazosin, an alpha[1]-adrenergic blocker.In the first doxazosin study, a single oral dose of tadalafil 20 mg or placebo was administered in a 2-period, crossover design to healthy subjects taking oral doxazosin 8 mg daily (N=18 subjects). Doxazosin was administered at the same time as tadalafil or placebo after a minimum of seven days of doxazosin dosing (see Table 4 and Figure 2).Blood pressure was measured manually at 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, and 24 hours after tadalafil or placebo administration. 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 5 and Figure 3.Figure 3: Doxazosin Study 2 (Part C): Mean Change from Time-Matched Baseline in Systolic Blood PressureBlood pressure was measured by ABPM every 15 to 30 minutes for up to 36 hours after tadalafil or placebo. The results are shown in Table 6.Blood pressure was measured manually pre-dose at two time points (-30 and -15 minutes) and then at 1, 2, 60 mg generic cialis 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.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. In vitro data suggests that metabolites are not expected to be pharmacologically active at observed metabolite concentrations.Elimination — The mean oral clearance for tadalafil is 2.5 L/hr and the mean terminal half-life is 17.5 hours in healthy subjects. However, greater sensitivity to medications in some older individuals should be considered [see Use in Specific Populations (8.5)].Pediatric — Tadalafil has not been evaluated in individuals less than 18 years old [see Use in Specific Populations (8.4)]. PDE5 is found in corpus cavernosum smooth muscle, vascular and visceral smooth muscle, skeletal muscle, platelets, kidney, lung, cerebellum, and pancreas. Effect on Blood Pressure When Administered With Alpha Blockers Six randomized, double-blinded, crossover clinical pharmacology studies were conducted to investigate the potential interaction of tadalafil with alpha-blocker agents in healthy male subjects [see Dosage and Administration (2.4) and Warnings and Precautions (5.6)]. In two studies, daily oral alpha blocker (at least 7 days duration) was administered to healthy male subjects taking repeated daily doses of tadalafil.

Product	Dosage	Quantity + Bonus	Price
Cialis Generic	40mg	10 Pills	37.79€ 35.99€
Cialis Generic	60mg	360 + 10 Pills	570.52€ 543.35€
Cialis Black	80mg	270 + 10 Pills	502.88€ 478.93€
Cialis Original	20mg	76 + 4 Pills	319.19€ 303.99€
Cialis Generic	40mg	360 + 10 Pills	477.87€ 455.11€
Cialis Super Active	20mg	90 + 10 Pills	314.14€ 299.18€
Cialis Professional	40mg	180 + 4 Pills	618.23€ 588.79€
Cialis Generic	20mg	20 Pills	54.72€ 52.11€
Cialis Professional	20mg	120 + 4 Pills	291.68€ 277.79€
Cialis Original	20mg	48 + 4 Pills	224.69€ 213.99€
Cialis Generic	60mg	90 + 6 Pills	196.67€ 187.30€

Doxazosin was administered at the same time as tadalafil or placebo after a minimum of seven days of doxazosin dosing (see Table 4 and Figure 2). 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 5 and Figure 3.

Color	Description	Brand Name Variations	Visual Notes
White	Most common, standard look	Cialis Classic	Smooth, glossy surface
Blue	Less common, for specific brands	Generic versions	Matte or shiny finish
Yellow	Rare, specialty formulations	N/A	Bright, vibrant appearance

The results are shown in Table 6. Elimination — The mean oral clearance for tadalafil is 2.5 L/hr and the mean terminal half-life is 17.5 hours in healthy subjects. Pediatric — dapoxetine and cialis Tadalafil has not been evaluated in individuals less than 18 years old [see Use in Specific Populations (8.4)]. 13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of FertilityTadalafil was not carcinogenic to rats or mice when administered daily for 2 years at doses up to 400 mg/kg/day.

More about Cialis (tadalafil)

Systemic drug exposures, as measured by AUC of unbound tadalafil, were approximately 10-fold for mice, and 14- and 26-fold for male and female rats, respectively, the exposures in human males given Maximum Recommended Human Dose (MRHD) of 20 mg.Tadalafil was not mutagenic in the in vitro bacterial Ames assays or the forward mutation test in mouse lymphoma cells. Tadalafil was not clastogenic in the in vitro chromosomal aberration test in human lymphocytes or the in vivo rat micronucleus assays.There were no effects on fertility, reproductive performance or reproductive organ morphology in male or female rats given oral doses of tadalafil up to 400 mg/kg/day, a dose producing AUCs for unbound tadalafil of 14-fold for males or 26-fold for females the exposures observed in human males given the MRHD of 20 mg. The abnormal blood-cell findings were reversible within 2 weeks upon removal of the drug.Reproductive Toxicology StudiesReproduction studies have been performed in rats and mice at exposures up to 11 times the maximum recommended human dose (MRHD) of 20 mg and have revealed no evidence of impaired fertility or harm to the fetus due to tadalafil. In addition, there was no evidence of teratogenicity, embryotoxicity, or fetotoxicity when tadalafil was given to pregnant rats or mice at exposures up to 11 times the MRHD during the period of major organ development.In a rat prenatal and postnatal development study at doses of 60, 200, and 1000 mg/kg, a reduction in postnatal survival of pups was observed. This gives approximately 16 and 10 fold exposure multiples, respectively, of the human AUC for the MRHD of 20 mg.

The Bottom Line

Tadalafil and/or its metabolites cross the placenta, resulting in fetal exposure in rats.Tadalafil and/or its metabolites were secreted into the milk in lactating rats at concentrations approximately 2.4-fold greater than found in the plasma. Tadalafil was not carcinogenic to rats or mice when administered daily for 2 years at doses up to 400 mg/kg/day. Tadalafil was not mutagenic in the in vitro bacterial Ames assays or the forward mutation test in mouse lymphoma cells. There were no effects on fertility, reproductive performance or reproductive organ morphology in male or female rats given oral doses of tadalafil up to 400 mg/kg/day, a dose producing AUCs for unbound tadalafil of 14-fold for males or 26-fold for females the exposures observed in human males given the MRHD of 20 mg. The abnormal blood-cell findings were reversible within 2 weeks upon removal of the drug.

How They Actually Work

Reproduction studies have been performed in rats and mice at exposures up to 11 times the maximum recommended human dose (MRHD) of 20 mg and have revealed no evidence of impaired fertility or harm to the fetus due to tadalafil. In addition, there was no evidence of teratogenicity, embryotoxicity, or fetotoxicity when tadalafil was given to pregnant rats or mice at exposures up to 11 times the MRHD during the period of major organ development. In a rat prenatal and postnatal development study at doses of 60, 200, and 1000 mg/kg, a reduction in postnatal survival of pups was observed. This gives approximately 16 and 10 fold exposure multiples, respectively, of the human AUC for the MRHD of 20 mg. Tadalafil and/or its metabolites cross the placenta, resulting in fetal exposure in rats. Systemic drug exposures, as measured by AUC of unbound tadalafil, were approximately 10-fold for mice, and 14- and 26-fold for male and female rats, respectively, the exposures in human males given Maximum Recommended Human Dose (MRHD) of 20 mg.Tadalafil was not mutagenic in the in vitro bacterial Ames assays or the forward mutation test in mouse lymphoma cells. Tadalafil was not clastogenic in the in vitro chromosomal aberration test in human lymphocytes or the in vivo rat micronucleus assays.There were no effects on fertility, reproductive performance or reproductive organ morphology in male or female rats given oral doses of tadalafil up to 400 mg/kg/day, a dose producing AUCs for unbound tadalafil of 14-fold for males or 26-fold for females the exposures observed in human males given the MRHD of 20 mg.

The pill's appearance is documented in the official prescribing information.
This document is called the package insert or label.
The "Description" section details shape, color, and imprint.
This information is legally required for all prescription drugs.
The appearance description helps pharmacists verify dispensing.
It also aids law enforcement in identifying diverted pharmaceuticals.
Customs officials may use appearance to spot illegal shipments.
The distinct look makes it less likely to be accidentally ingested.
It is not attractive to children due to its plain, medicinal look.
Child-resistant packaging further complements the safety design.
The appearance supports the overall safe use ecosystem.

The abnormal blood-cell findings were reversible within 2 weeks upon removal of the drug.Reproductive Toxicology StudiesReproduction studies have been performed in rats and mice at exposures up to 11 times the maximum recommended human dose (MRHD) of 20 mg and have revealed no evidence of impaired fertility or harm to the fetus due to tadalafil. In addition, there was no evidence of teratogenicity, embryotoxicity, or fetotoxicity when tadalafil was given to pregnant rats or mice at exposures up to 11 times the MRHD during the period of major organ development.In a rat prenatal and postnatal development study at doses of 60, 200, and 1000 mg/kg, a reduction in postnatal survival of pups was observed. This gives approximately 16 and 10 fold exposure multiples, respectively, of the human AUC for the MRHD of 20 mg. Tadalafil and/or its metabolites cross the placenta, resulting in fetal exposure in rats.Tadalafil and/or its metabolites were secreted into the milk in lactating rats at concentrations approximately 2.4-fold greater than found in the plasma. Tadalafil was not carcinogenic to rats or mice when administered daily for 2 years at doses up to 400 mg/kg/day. Tadalafil was not mutagenic in the in vitro bacterial Ames assays or the forward mutation test in mouse lymphoma cells.

Dosage	Color	Size	Imprint	Visual Characteristics
5 mg	Light Blue	Slightly smaller	"5" or "C5"	Compact and pale
10 mg	Blue	Standard	"10"	Medium size, bold imprint
20 mg	Dark Blue	Larger	"20" or "C20"	Largest, darker hue

There were no effects on fertility, reproductive performance or reproductive organ morphology in male or female rats given oral doses of tadalafil up to 400 mg/kg/day, a dose producing AUCs for unbound tadalafil of 14-fold for males or 26-fold for females the exposures observed in human males given the MRHD of 20 mg. The abnormal blood-cell findings were reversible within 2 weeks upon removal of the drug.

What Are Side Effects Associated with Using Tadalafil (Zovirax)?

14.1 CIALIS for Use as Needed

Tadalafil and/or its metabolites were secreted into the milk in lactating rats at concentrations approximately 2.4-fold greater than found in the plasma.

High or low blood pressure

In addition, there was no evidence of teratogenicity, embryotoxicity, or fetotoxicity when tadalafil was given to pregnant rats or mice at exposures up to 11 times the MRHD during the period of major organ development. In a rat prenatal and postnatal development study at doses of 60, 200, and 1000 mg/kg, a reduction in postnatal survival of pups was observed.

5.4 Hearing Impairment

Doxazosin was administered at the same time as tadalafil or placebo after a minimum of seven days of doxazosin dosing (see Table 4 and Figure 2).Blood pressure was measured manually at 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, and 24 hours after tadalafil or placebo administration. 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 5 and Figure 3.Figure 3: Doxazosin Study 2 (Part C): Mean Change from Time-Matched Baseline in Systolic Blood PressureBlood pressure was measured by ABPM every 15 to 30 minutes for up to 36 hours after tadalafil or placebo. The results are shown in Table 6.Blood pressure was measured manually pre-dose at two time points (-30 and -15 minutes) and then at 1, 2, 60 mg generic cialis 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.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. In vitro data suggests that metabolites are not expected to be pharmacologically active at observed metabolite concentrations.Elimination — The mean oral clearance for tadalafil is 2.5 L/hr and the mean terminal half-life is 17.5 hours in healthy subjects.

Cost Comparison

However, greater sensitivity to medications in some older individuals should be considered [see Use in Specific Populations (8.5)].Pediatric — Tadalafil has not been evaluated in individuals less than 18 years old [see Use in Specific Populations (8.4)]. PDE5 is found in corpus cavernosum smooth muscle, vascular and visceral smooth muscle, skeletal muscle, platelets, kidney, lung, cerebellum, and pancreas. Effect on Blood Pressure When Administered With Alpha Blockers Six randomized, double-blinded, crossover clinical pharmacology studies were conducted to investigate the potential interaction of tadalafil with alpha-blocker agents in healthy male subjects [see Dosage and Administration (2.4) and Warnings and Precautions (5.6)]. In two studies, daily oral alpha blocker (at least 7 days duration) was administered to healthy male subjects taking repeated daily doses of tadalafil. Doxazosin was administered at the same time as tadalafil or placebo after a minimum of seven days of doxazosin dosing (see Table 4 and Figure 2).

Other uses

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 5 and Figure 3. The results are shown in Table 6. Elimination — The mean oral clearance for tadalafil is 2.5 L/hr and the mean terminal half-life is 17.5 hours in healthy subjects. Pediatric — dapoxetine and cialis Tadalafil has not been evaluated in individuals less than 18 years old [see Use in Specific Populations (8.4)]. 13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of FertilityTadalafil was not carcinogenic to rats or mice when administered daily for 2 years at doses up to 400 mg/kg/day. This gives approximately 16 and 10 fold exposure multiples, respectively, of the human AUC for the MRHD of 20 mg. Tadalafil and/or its metabolites cross the placenta, resulting in fetal exposure in rats. Tadalafil and/or its metabolites were secreted into the milk in lactating rats at concentrations approximately 2.4-fold greater than found in the plasma.