| Active substance | Tadalafil  | 
		
|---|---|
| Formula | C22H19N3O4  | 
		
| Side effects | Headache, stomach upset, back pain, muscle soreness, stuffy nose, flushing, or dizziness  | 
		
| Effects | Improves erectile function, can increase exercise capacity in certain conditions  | 
		
| Dosage (sports) | Not typically used for sports enhancement  | 
		
| Dosage (medical) | 10 mg or 20 mg taken before sexual activity, not more than once per day  | 
		
| Half-life | 17.5 hours  | 
		
| Main action | Increases blood flow to particular areas of the body and relaxes muscles  | 
		
| Substance class | Phosphodiesterase type 5 (PDE5) inhibitor  | 
		
| Chemical name | Tadalafil  | 
		
| Storage conditions | Store at room temperature away from moisture and heat  | 
		
| Trade name | Cialis  | 
		
| Blood pressure | Can cause a slight reduction in blood pressure  | 
		
| Also known as | Cialis, Adcirca  | 
		
| Lab Test | Blood levels of tadalafil can be measured, though not commonly done  | 
		
| Hepatotoxicity | Low  | 
		
| Water Retention | None  | 
		
| Use in sports | Not commonly used in sports  | 
		
| Manufacturer | Centurion Laboratories  | 
		





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