Long-Term Safety Study of Fluticasone Propionate (Fp) Multidose Dry Powder Inhaler (MDPI) and Fluticasone Propionate/Salmeterol (FS) MDPI in Patients With Persistent Asthma

Inclusion Criteria

• Best pre-bronchodilator forced expiratory volume in 1 second (FEV1) of greater than 40% of their predicted normal value.
• Patients must have a treatment regimen that includes a short-acting β2 agonist (SABA) (albuterol) for use as needed and either an inhaled corticosteroid (ICS) or an ICS/long-acting β2 agonist (LABA) as a preventative treatment for a minimum of 8 weeks before the SV. Patients currently taking low-dose ICS without LABA are not eligible for this study. Patients currently taking low-dose ICS/LABA may only be entered into the mid ICS strength. All patients must have been maintained on a stable dose of ICS or ICS/LABA for 4 weeks prior to the SV (or pre-SV if necessary) at 1 qualifying doses
• To meet reversibility of disease criteria, the patient must demonstrate a ≥12% reversibility of FEV1 (and 200 mL for patients aged18 years and older) within 30 minutes following 4 inhalations of albuterol at the SV. Historic reversibility within the past 12 months of the SV may be used to meet this criterion.
• Written informed consent/assent is obtained. For adult patients (aged 18 years and older, or as applicable per local regulations), the written informed consent form (ICF) must be signed and dated by the patient before conducting any study-related procedure. For minor patients (aged 12 to 17 years, or as applicable per local regulations), the written ICF must be signed and dated by the parent/legal guardian and the written assent form must be signed and dated by the patient (if applicable) before conducting any study-related procedure. Note: Age requirements are as specified by local regulations.
• Outpatient >= 12 years of age on the date of consent/assent. .
• Asthma diagnosis: The patient has a diagnosis of asthma as defined by the National Institutes of Health (NIH). The asthma diagnosis has been present for a minimum of 3 months and has been stable (defined as no exacerbations and no changes in medication) for at least 30 days before providing informed consent.
• The patient is able to perform acceptable and repeatable spirometry.
• The patient is able to perform peak expiratory flow (PEF) with a handheld peak flow meter.
• The patient is able to use a metered-dose inhaler (MDI) device without a spacer device and a MDPI device.
• The patient is able to withhold (as judged by the investigator) his or her regimen of ICS or study drug, and rescue medication for at least 6 hours before the SV and before all treatment visits where spirometry is performed.
• The patient/parent/legal guardian/caregiver is capable of understanding the requirements, risks, and benefits of study participation, and, as judged by the investigator, capable of giving informed consent/assent and being compliant with all study requirements.
• SABAs: All patients must be able to replace their current SABA with albuterol/salbutamol HFA inhalation aerosol at the SV for use as needed for the duration of the study.
• Female patients may not be pregnant, breastfeeding, or attempting to become pregnant.
• -Other criteria may apply, please contact the investigator for more information

Exclusion Criteria

• The patient has a history of a life-threatening asthma exacerbation that is defined for this protocol as an asthma episode that required intubation and/or was associated with hypercapnea, respiratory arrest, or hypoxic seizures.
• The patient is pregnant or lactating, or plans to become pregnant during the study period or for 30 days after the study.
• The patient has participated as a randomized patient in any investigational drug study within the 30 days preceding the SV (or prescreening visit, as applicable) or plans to participate in another investigational drug study at any time during this study.
• The patient has previously participated in an Fp MDPI or FS MDPI study.
• The patient has a known hypersensitivity to any corticosteroid, salmeterol, or any of the excipients in the study drug or rescue