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CIALIS (tadalafil) is not indicated for use in females. There are no data with the use of CIALIS in pregnant women to inform any drug-associated risks for adverse developmental outcomes.

• Cost and insurance coverage vary widely by region and plan.
• Brand-name Cialis was historically very expensive.
• Most insurance plans now cover generic tadalafil with a copay.
• Medicare Part D plans typically cover it for approved indications.
• Prices can be compared using pharmacy discount cards or apps.
• Some online services offer telemedicine prescriptions and delivery.
• Always verify the legitimacy of any online pharmacy before purchasing.

In animal reproduction studies, no adverse developmental effects were observed with oral administration of tadalafil to pregnant rats or

Side Effect	Frequency	Severity	Possible Cause
Headache	Common	Mild	Vasodilation effects
Flushing	Common	Mild	Blood vessel dilation
Dizziness	Less common	Mild	Blood pressure fluctuations
Upset stomach	Rare	Mild	Formulation ingredients

mice during organogenesis at exposures up to 11 times the maximum recommended human dose (MRHD) of 20 mg/day (see Data).

2.3 CIALIS for Once Daily Use for Benign Prostatic Hyperplasia

Alpha-Blockers — Caution is advised when PDE5 inhibitors are coadministered with alpha-blockers. [see Dosage and Administration (2.7), Warnings and Precautions (5.6), and Clinical Pharmacology (12.2)]. Antihypertensives — PDE5 inhibitors, including tadalafil, are mild systemic vasodilators. [see Warnings and Precautions (5.6) and Clinical Pharmacology (12.2)]. Alcohol — Both alcohol and tadalafil, a PDE5 inhibitor, act as mild vasodilators.

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[see Warnings and Precautions (5.9) and Clinical Pharmacology (12.2)]. [See Dosage and Administration (2.7) and Warnings and Precautions (5.10)]. Nizatidine) — An increase in gastric pH resulting from administration of nizatidine had no significant effect on pharmacokinetics. Cytochrome P450 Inhibitors — CIALIS is a substrate of and predominantly metabolized by CYP3A4. Studies have shown that drugs that inhibit CYP3A4 can increase tadalafil exposure. Animal reproduction studies showed no evidence of teratogenicity, embryotoxicity,

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or fetotoxicity when tadalafil was given orally to pregnant rats

1.1 Erectile Dysfunction

CYP3A4 (e.g., Ketoconazole) — Ketoconazole (400 mg daily), a selective and potent inhibitor of CYP3A4, increased tadalafil 20 mg single-dose exposure (AUC) by 312% and Cmax by 22%, relative to the values for tadalafil 20 mg alone. Ketoconazole (200 mg daily) increased tadalafil 10-mg single-dose exposure (AUC) by 107% and Cmax by 15%, relative to the values for tadalafil 10 mg alone [see Dosage and Administration (2.7)]. Although specific interactions have not been studied, other CYP3A4 inhibitors, such as erythromycin, itraconazole, and grapefruit juice, would likely increase tadalafil exposure. HIV Protease inhibitor — Ritonavir (500 mg or 600 mg twice daily at steady state), an inhibitor of CYP3A4, CYP2C9, CYP2C19, and CYP2D6, increased tadalafil 20-mg single-dose exposure (AUC) by 32% with a 30% reduction in Cmax, relative to the values for tadalafil 20 mg alone. Although specific interactions have not been studied, other HIV protease inhibitors would likely increase tadalafil exposure [see Dosage and Administration (2.7)].

Does tadalafil improve endothelial function for better workouts?

Cytochrome P450 Inducers — Studies have shown that drugs that induce CYP3A4 can decrease tadalafil exposure. CYP3A4 (e.g., Rifampin) — Rifampin (600 mg daily), a CYP3A4 inducer, reduced tadalafil 10-mg single-dose exposure (AUC) by 88% and Cmax by 46%, relative to the values for tadalafil 10 mg alone. The reduced exposure of tadalafil with the coadministration of rifampin or other CYP3A4 inducers can be anticipated to decrease the efficacy of CIALIS for once daily use; the magnitude of decreased efficacy is unknown. Cytochrome P450 Substrates — CIALIS is not expected to cause clinically significant inhibition or induction of the clearance of drugs metabolized by cytochrome P450 (CYP) isoforms. Studies have shown that tadalafil does not inhibit or induce P450 isoforms CYP1A2, CYP3A4, CYP2C9, CYP2C19, CYP2D6, and CYP2E1. or mice at exposures up to 11 times the maximum recommended human dose (MRHD) of 20 mg/day during organogenesis.

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When tadalafil was administered to subjects taking theophylline, a small augmentation (3 beats per minute) of the increase in heart rate associated with theophylline was observed. 8 USE IN SPECIFIC POPULATIONS 8.1 PregnancyRisk SummaryCIALIS (tadalafil) is not indicated for use in females.There are no data with the use of CIALIS in pregnant women to inform any drug-associated risks for adverse developmental outcomes. In animal reproduction studies, no adverse developmental effects were observed with oral administration of tadalafil to pregnant rats or mice during organogenesis at exposures up to 11 times the maximum recommended human dose (MRHD) of 20 mg/day (see Data).DataAnimal DataAnimal reproduction studies showed no evidence of teratogenicity, embryotoxicity, or fetotoxicity when tadalafil was given orally to pregnant rats or mice at exposures up to 11 times the maximum recommended human dose (MRHD) of 20 mg/day during organogenesis. In a prenatal/postnatal developmental study in rats, postnatal pup survival decreased following maternal exposure to tadalafil doses greater than 10 times the MRHD based on AUC. Signs of maternal toxicity occurred at doses greater than 16 times the MRHD based on AUC.

Erectile Dysfunction

Surviving offspring had normal development and reproductive performance.In another rat prenatal and postnatal development study at doses of 60, 200, and 1000 mg/kg, a reduction in postnatal survival of pups was observed. The no observed effect level (NOEL) for maternal toxicity was 200 mg/kg/day and for developmental toxicity was 30 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.8.2 LactationRisk SummaryCIALIS is not indicated for use in females.There is no information on the presence of tadalafil and/or metabolites in human milk, the effects on the breastfed child, or the effects on milk production. Tadalafil and/or its metabolites are present in the milk of lactating rats at concentrations approximately 2.4-fold greater than found in the plasma.8.3 Females and Males of Reproductive PotentialInfertilityBased on the data from 3 studies in adult males, tadalafil decreased sperm concentrations in the study of 10 mg tadalafil for 6 months and the study of 20 mg tadalafil for 9 months. This effect was not seen in the study of 20 mg tadalafil taken for 6 months. Surviving offspring had normal development and reproductive performance.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

The clinical significance of the decreased sperm concentrations in the two studies is unknown. There have been no studies evaluating the effect of tadalafil on fertility in men [see Clinical Pharmacology (12.2)].Based on studies in animals, a decrease in spermatogenesis was observed in dogs, but not in rats [see Nonclinical Toxicology (13.1)].8.4 Pediatric UseCIALIS is not indicated for use in pediatric patients. Safety and efficacy in patients below the age of 18 years have not been established.A randomized, double-blind, placebo-controlled trial in pediatric patients (7 to 14 years of age) with Duchenne muscular dystrophy, who received CIALIS 0.3 mg/kg, CIALIS 0.6 mg/kg, or placebo daily for 48 weeks failed to demonstrate any benefit of treatment with CIALIS on a range of assessments of muscle strength and performance.Juvenile Animal StudyNo adverse effects were observed in a study in which tadalafil was administered orally at doses of 60, 200, and 1000 mg/kg/day to juvenile rats on postnatal days 14 to 90. The highest plasma tadalafil exposures (AUC) cialis 5 price achieved were approximately 10-fold that observed at the MRHD.8.5 Geriatric UseOf the total number of subjects in ED clinical studies of tadalafil, approximately 19 percent were 65 and over, while approximately 2 percent were 75 and over. Of the total number of subjects in BPH clinical studies of tadalafil (including the ED/BPH study), approximately 40 percent were over 65, while approximately 10 percent were 75 and over.

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In these clinical trials, no overall differences in efficacy or safety were observed between older (>65 and ≥75 years of age) and younger subjects (≤65 years of age). However, in placebo-controlled studies with CIALIS for use as needed for ED, diarrhea was reported more frequently in patients 65 years of age and older who were treated with CIALIS (2.5% of patients) [see Adverse Reactions (6.1)]. No dose adjustment is warranted based on age alone. However, a greater sensitivity to medications in some older individuals should be considered. [see Clinical Pharmacology (12.3)].8.6 Hepatic ImpairmentIn clinical pharmacology studies, tadalafil exposure (AUC) in subjects with mild or moderate hepatic impairment (Child-Pugh Class A or B) was comparable to exposure in healthy subjects when a dose of 10 mg was administered. In another rat prenatal and postnatal development study at doses of 60,

2.2 CIALIS for Once Daily Use for Erectile Dysfunction

Hemodialysis (performed between 24 and 30 hours post-dose) contributed negligibly to tadalafil or metabolite elimination. In a clinical pharmacology study (N=28) at a dose of 10 mg, back pain was reported as a limiting adverse event in male patients with creatinine clearance 30 to 50 mL/min. At a dose of 5 mg, the incidence and severity of back pain was not significantly different than in the general population. In patients on hemodialysis taking 10- or 20-mg tadalafil, there were no reported cases of back pain. [see Dosage and Administration (2.6) and Warnings and Precautions (5.7)]. 200, and 1000 mg/kg, a reduction in postnatal survival of pups was observed.

5.11 Combination With Other PDE5 Inhibitors or Erectile Dysfunction Therapies

There are no available data for doses higher than 10 mg of tadalafil in patients with hepatic impairment. Insufficient data are available for subjects with severe hepatic impairment (Child-Pugh Class C). [see Dosage and Administration (2.6) and Warnings and Precautions (5.8)].8.7 Renal ImpairmentIn clinical pharmacology studies using single-dose tadalafil (5 to 10 mg), tadalafil exposure (AUC) doubled in subjects with creatinine clearance 30 to 80 mL/min. In subjects with end-stage renal disease on hemodialysis, there was a two-fold increase in Cmax and 2.7- to 4.8-fold increase in AUC following single-dose administration of 10 or 20 mg tadalafil. Exposure to total methylcatechol (unconjugated plus glucuronide) was 2- to 4-fold higher in subjects with renal impairment, compared to those with normal renal function. This gives approximately 16 and 10 fold exposure multiples, respectively, of the human AUC for the MRHD of 20 mg.

• Generic tadalafil became available after Lilly's patent expired.
• Generics are bioequivalent to the brand-name Cialis.
• They are significantly less expensive than the branded medication.
• Many online and brick-and-mortar pharmacies dispense generic tadalafil.
• Patients should ensure they purchase from a licensed, reputable source.
• Dosage strengths and indications are identical to the brand.
• Lilly still manufactures and markets the branded Cialis in some regions.