Don't know of specific meds that are allowed....
Here's an older 2003 link of drugs not allowed (21 CFR 1308.11 Schedule I):
http://a257.g.akamaitech.net/7/257/2...cfr1308.11.htm
Here's some general information and links....
FMCSA Part 391:
(b)(12)(i) Does not use a controlled substance identified in 21 CFR 1308.11 Schedule I, an amphetamine, a narcotic, or any other habit-forming drug.
(b)(12)(ii) Exception. A driver may use such a substance or drug, if the substance or drug is prescribed by a licensed medical practitioner who:
(b)(12)(ii)(A) Is familiar with the driver's medical history and assigned duties; and
(b)(12)(ii)(B) Has advised the driver that the prescribed substance or drug will not adversely affect the driver's ability to safely operate a commercial motor vehicle; and
(b)(13) Has no current clinical diagnosis of alcoholism.
Advisory Criteria for 391.41(b)(12): http://www.fmcsa.dot.gov/rules-regul...htm#mrc391.41]
A person is physically qualified to drive a commercial vehicle if that person:
Does not use a controlled substance identified in 21 CFR 1308.11, Schedule I, an amphetamine, a narcotic, or any other habit-forming drug.
Exception: A driver may use such a substance or drug, if the substance or drug is prescribed by a licensed medical practitioner who is familiar with the driver's medical history and assigned duties; and has advised the driver that the prescribed substance or drug will not adversely affect the driver's ability to safely operate a commercial motor vehicle.
This exception does not apply to the use of methadone.
The intent of the medical certification process is to medically evaluate a driver to ensure that the driver has no medical condition which interferes with the safe performance of driving tasks on a public road. If a driver uses a Schedule I drug or other substance, amphetamine, a narcotic, or any other habit-forming drug, it may be cause for the driver to be found medically unqualified. Motor carriers are encouraged to obtain a practitioner's written statement about the effects on transportation safety of the use of a particular drug.
Frequently asked medical questions:
http://www.fmcsa.dot.gov/rules-regul...edical/faq.asp
FYI -- Court case: individual took JB Hunt to court for not hiring him because of side-effects of prescription medication (warning: legalese ahead!). The court ruled in favor of JB Hunt:
http://caselaw.lp.findlaw.com/script...016084&exact=1
FYI -- From an employer's perspective:
http://www.occmedphysicians.com/articles/dotexam.pdf