Hi, thanks for using healthcare magic

Allergies to medications are common and it most often presents in the type of skin rash you are describing.

There are certain factors that increase the risk of an allergic response such as :(1) the nature of the drug - there are some drugs that contain additional chemical reactants that are more likely to cause an allergic response

(2) duration of exposure -it is thought that in some persons the prolonged use of medication especially at high doses may result in higher risk of an allergic response

(3)route the drug is given- creams are more likely to cause reaction

(4) cross sensitisation by the use of other medication at the same time- for example if a person had history of a previous reaction to a medication and is given another with a similar structure there may be a reaction to this new drug

(5) genetic or hereditary factors

(6) age and sex of the person

(7) previous problems with drug reactions also play a part.

Diagnosis of the drug causing the allergy can be difficult. It requires a careful history looking at any previous reaction and the time frame in which the rash occurs.Most reactions develop 5 to 7 days after first taking the drug.

In addition your doctor has the option of discontinuing one of the medications at a time temporarily if possible to see if it is responsible for the reaction.

At this present time there are allergy tests that are available for some drugs. These are blood tests, your GP can consider checking whether the which drugs can be tested in the lab in your area.

The other option is an allergist. These are doctors that specialise in allergies, they may be able to help you.

I hope this helps, feel free to ask any other questions

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HI


All drugs have the potential to cause an allergic reaction because the response to a medication varies from person to person.

You are on a host of medication, it is even possible that you are reacting to more than one medication.
Of the medications that you have mentioned some studies have suggested that some are more likely to have alllergic response however it is important to remember it may another one that may be affecting you.

Thiazide diurectic (present in the micardis plus which is two medications combined) can cause an allergic rash.
Amlodipine ( the other name for norvasc) also has a high rate of skin reactions in some persons.

You may want to consider asking your doctor to refer you to an allergist to help diagnose exactly which drug is involved.

Please feel free to ask any additional questions

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I am glad to help, feel free to contact with any additional queries

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