I would consult your physician, I am assuming you are trying to combat the restlessness the concerta is giving you. I wouldn't recommend benadryl as a long term sleep aid when I'm positive your doctor will have a better solution.
take robitussin
Yes
A kitten should not take Robitussin DM. If you feel your kitten may be sick, it is best to take it to an animal hospital.
Ask your physician.
Yes
can you take paracetamol and concerta together
if you take concerta and stop and have to take a drug test two days later, will concerta show up at all.
Many Robitussin products on the market already contain pseudoephedrine. Even so, yes, pseudoephedrine is relatively harmless and alone will not negatively interact with Dextromethorphan or any other active substances in Robitussin products.
can you take hydrocodone-homatropine syrup with tamifle
Yes; taking some expectorants can reduce the effectiveness of Concerta. If you need to take an expectorant for an extended period of time, consult your doctor.
Take it when you don't have ADD or ADHD.
Yes