RESUMO
Reduced cigarette smoke exposure in adult smokers switching from a conventional cigarette (CC) to a potential exposure-reduced electrically heated cigarette smoking system (EHCSS) and no smoking (NS) improved exercise performance. The effects of reduced smoke exposure on the prognostic parameters heart rate (HR) and rate-pressure-product (RPP) were investigated. A total of 18 male adult CC-smokers were randomized in a 3-period cross-over study to CC, EHCSS, or to NS for 3 days each before performing spiroergometry. Exposure parameters declined from CC to EHCSS and to NS. Resting HR and RPP increased from NS to EHCSS and to CC. Chronotropic response/HR recovery were more pronounced in NS than in EHCSS and CC. RPPmax was similar in NS and EHCSS and lowest during CC. Reduced tobacco smoke exposure for 3 days improved the prognostic parameters HR and RPP in an apparently dose-dependent manner.
Assuntos
Pressão Sanguínea/efeitos dos fármacos , Frequência Cardíaca/efeitos dos fármacos , Abandono do Hábito de Fumar , Fumar/efeitos adversos , Poluição por Fumaça de Tabaco/efeitos adversos , Adulto , Estudos Cross-Over , Relação Dose-Resposta a Droga , Teste de Esforço , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Método Simples-Cego , Fumar/fisiopatologia , Espirometria , Fatores de TempoRESUMO
The study was carried out as an open-label, but laboratory-blind, single-dose, single-centre, randomized, two-period crossover study. Twenty-two patients with iron deficiency anemia completed the study. The study consisted of two treatment phases of 36 h, separated by a washout period of between 6 and 14 days. The two treatments were given orally. The reference treatment was tetracycline (CAS 60-54-8) alone (2 x 250 mg capsules) and the test treatment was iron(III)-hydroxide polymaltose complex (IPC, Maltofer) together with tetracycline (2 x 250 mg capsules). IPC had no pharmacokinetic effect on the rate of absorption of tetracycline. With concomitant administration of tetracycline and IPC sufficiently high tetracycline concentrations, to ensure bacteriostasis, will be reached. An inhibitor effect of IPC to the tetracycline absorption, as it is known for ferrous salts, could not be observed.
Assuntos
Anemia Ferropriva/metabolismo , Antibacterianos/farmacocinética , Compostos Férricos/efeitos adversos , Tetraciclina/farmacocinética , Adulto , Algoritmos , Anemia Ferropriva/sangue , Anemia Ferropriva/tratamento farmacológico , Área Sob a Curva , Interações Medicamentosas , Feminino , Compostos Férricos/farmacocinética , Compostos Férricos/uso terapêutico , Meia-Vida , Humanos , Absorção Intestinal/efeitos dos fármacos , Masculino , Pessoa de Meia-Idade , Controle de Qualidade , Tamanho da Amostra , Método Simples-CegoRESUMO
The study was carried out as an open-label, laboratory-blind, single-dose, randomized, two-period crossover, isotope efficacy study. Twenty-two patients with iron-deficiency anemia were enrolled in the study. The study consisted of two treatment phases of 15 days each, including blood sample measurements for Fe-59 activity. The 2 treatments were given orally. Treatment A was Fe-59 labeled iron(III)-hydroxide polymaltose complex (IPC, Maltofer), equivalent to 100 mg elemental iron given orally, and Treatment B consisted of Treatment A combined with 600 mg aluminium hydroxide (CAS 21645-51-2) (10 ml). No differences between the two treatment groups with regard to the erythrocyte uptake were found, and thus IPC can be used with aluminium hydroxide, if necessary.
Assuntos
Hidróxido de Alumínio/farmacologia , Anemia Ferropriva/tratamento farmacológico , Antiácidos/farmacologia , Compostos Férricos/farmacocinética , Compostos Férricos/uso terapêutico , Ferro/farmacocinética , Adolescente , Adulto , Algoritmos , Animais , Área Sob a Curva , Disponibilidade Biológica , Fenômenos Químicos , Físico-Química , Suplementos Nutricionais , Método Duplo-Cego , Eritrócitos/efeitos dos fármacos , Eritrócitos/metabolismo , Feminino , Compostos Férricos/efeitos adversos , Ferritinas/sangue , Humanos , Absorção Intestinal/efeitos dos fármacos , Radioisótopos de Ferro , Masculino , Camundongos , Pessoa de Meia-Idade , Controle de Qualidade , RatosRESUMO
The study was carried out as an open-label, laboratory-blind, single-dose, randomized, two-period crossover, isotope efficacy study. Twenty-two patients with iron-deficiency anemia were enrolled in the study. The study consisted of two treatment phases of 15 days each, including blood sample measurements for Fe-59 activity. The two treatments were given orally. Treatment A was Fe-59 labeled iron(III)-hydroxide polymaltose complex (IPC, Maltofer) equivalent to 100 mg elemental iron given orally. Treatment B consisted of Fe-59 labeled IPC complex equivalent to 100 mg elemental iron and 500 mg tetracycline HCl (CAS 64-75-5) given orally. No differences between the two treatment groups with regard to the erythrocyte iron uptake were found, and thus IPC can be used with tetracycline, if necessary.
