Allergic reaction to formula?

[TwistTee]

As if I do not feel bad enough for introducing formula for the first time to my 4 month old last night, he has woken up with constipation and is covered in red hive like blotches. It looks like some sort of allergic reaction to the formula, Aptimil.
I am waiting for the surgery to open to take him in. No breathing difficulties so I do not think it is an emergency, but I am watching him closely just in case.
Has anyone experienced this?

[JiltedJohnsJulie]

Not experienced it myself but have seen it on here before. Hope all goes well at the GPs.

[Plentyoffish]

Good luck at the drs

Just wanted to say when I put my ds on formula we didn't get on with Aptamil either it would basically run straight through him and we were getting 9 explosive nappies a day.

We changed the formula to cow and gate and after about 10 days all back to normal.

[TwistTee]

Just got back from th GP. She recommended a low dose of Piriton for today and changing the formula, but otherwise she was happy with my ds. Thanks for the replies.