Brief Answer:
You need ICU set up for this.

Detailed Answer:
Hello dear,
In my opinion no need to check for allergy for penicillin. And there is no standard technique available to check this.
And there are good cheap alternatives to penicillin available like cephalosporin group, quinolone group etc.
But if you still want to check than better to get it done in ICU (Intensive Care Unit) facility. As if reaction develops you need injectable steroids and antihistamines and other supportive things like intravenous flids, oxygen etc. And all these are not possible in GP setting. You have to have ICU set up.
Intradermal injections are given in incremental doses and if patient develops chills, rigors, breathlessness, hypotension than he/she is considered to have allergy to penicillin.

Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.

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Brief Answer:
Intradermal test should be done.

Detailed Answer:
Hello dear, Thanks for your query on HCM.
Yes, Skin tests should be done for penicillin allergy. I have already mentioned this in my previous answer. I said Intradermal test, which means Skin test only. So skin test in the form of Intradermal injection of penicillin is given. If injection site is not producing any lesion than you are not allergic to it.
But if injection site shows Redness, Erythema, Itching, Blister formation than you are having penicillin allergy. In many cases the reaction is so severe that they develop rashes and itching on whole body with hypotension and breathing defficulties. So in this situation ICU set up is must to deal with this reaction. And no one can predict which patient gives severe allergic reaction to penicillin.
So it is advisable to do it in ICU setting only.
Hope I have solved your queries. If you do not have further queries, please close the conversation and rate the answer. Thanks.

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