My doctor just changed my daily medication (due to suspected allergy to Enalapril, which I have taken problem-free for 5 years).

From: Enalapril 30 mg + Amlodopine 5

To: Losartan 100 mg. + Amlodopine 5

My question is: By suddenly stopping Enalapril and replacing it with Losartan, am I in a dangerous "waiting period" (days? weeks?) until the Losartan begins to effectively lower my BP to a healthy level?