Revisado por Isabelle Baião de Mello Neto (CRF-MG 24309)Como os componentes agem?
Eficácia
Efeitos comprovados por estudos com outras formulações e publicações científicas1-13.
Referências Bibliográficas
1. A Double-Blind, Placebo-Controlled Study of the Effect of SCH 434 Compared to its Components in Patients with Seasonal Allergic Rhinitis. S85-034. Schering-Plough Corporation, Kenilworth, NJ.
2. A Double-Blind, Placebo-Controlled Study of the Effect of SCH 434 Compared to its Components in Patients with Seasonal Allergic Rhinitis, I86-305. Schering-Plough Corporation, Kenilworth, NJ.
3. A Double-Blind, Placebo-Controlled Study of the Effect of SCH 434 Compared to its Components in Patients with Seasonal allergic Rhinitis. S85-033. Schering-Plough Corporation, Kenilworth, NJ.
4. A Double-Blind, Placebo-Controlled Study of the Effect of SCH 434 Compared to its Components in Patients with Seasonal Allergic Rhinitis. I86-203/304. Schering-Plough Corporation, Kenilworth, NJ.
5. A Study of the Safety and Efficacy of SCH 434 Compared with Placebo in Patients with Seasonal Allergic Rhinitis. S85-035. Schering-Plough Corporation, Kenilworth, NJ.
6. Prieto U et al. Efficacy and safety of three different dosages of loratadine associated with pseudoephedrine, in children with allergic rhinitis. SCH 434 P92-002 Mexico Children’s Hospital, Mexico City, Mexico April 1993.
7. Davila Velazquez et al. Therapeutic Evaluation of Antihistamine and Pseudoephedrine Combinations in Children with Perennial Allergic Rhinitis. Invest Med Int 1993;(20):85-91.
8. González Gámez J et al. Efficacy and Safety of Two New Generation Antihistamines Associated to Pseudoephedrine in the Treatment of Children with Allergic Rhinitis: A Comparative Study. Invest Med Int 1993;(20):80-84.
9. Sánchez García M et al. Efficacy and Safety of Loratadine Plus Pseudoephedrine, Pediatric Solution, in Children with Allergic Rhinitis. Invest Med Int 1993;(20):92-98.
10. Cruz et al. A comparative study between astemizole-D and loratadine-D in the treatment of seasonal allergic rhinitis. Invest Med Int (Mexico) 1993;20(4):147-154.
11. Trejo Tapia D et al. Hacia un major control sintomatico de rinitis alergica. Invest Med Int (Mexico) 1993;20(2):76-79.
12. Paz Martinez D et al. Comparative assessment of astemizole-pseudoephedrine and loratadine pseudoephedrine in children with allergic rhinitis. Rev Alerg Mex. 1995;42(6):105-109.
13. Serra HA. Loratadine pseudoephedrine in children with allergic rhinitis: A controlled double-blind trial. Br J Clin Pharmacol 1998;45(2):147-150.
Como funcionam
Loratadina: anti-histamínico potente que bloqueia receptores H1 periféricos.
Pseudoefedrina: descongestionante que reduz inchaço nasal.
Farmacodinâmica
Não causa sedação significativa em dose normal. Em doses altas pode causar sonolência.
Pseudoefedrina age nos vasos nasais, reduzindo congestão. Pode causar estimulação leve.
Farmacocinética
Loratadina
Absorção rápida. Efeito começa em 1-3 horas. Meia-vida de 8-28 horas. Eliminada por urina e fezes.
Em doenças hepáticas: dose pode precisar ser reduzida.
Pseudoefedrina
Absorção
Desentope nariz em 30 minutos, efeito dura 4-12 horas conforme dose.
Eliminação
Excretada principalmente pela urina. Taxa alterada conforme pH urinário.