To investigate safety, tolerability, and pharmacokinetics of telmisartan and amlodipine following single administration of 40 mg telmisartan/5 mg amlodipine and 80 mg telmisartan/5 mg amlodipine, and subsequently, following multiple administration of 40 mg telmisartan/5 mg amlodipine and 80 mg telmisartan/5 mg amlodipine once daily for 10 days