Well, it looks like the article is too big to include as an attachment. You can google USPharmacist (no space) and then search under sleep apnea, to find the article. The info on drugs which worsen apnea follows:
Medications That May Worsen OSA: CNS depressants such as opiates, benzodiazepines, barbiturates, older sleep agents, and alcohol can actually worsen OSA by adversely affecting the control of ventilation during sleep and making the upper airway more easily collapsible.37,38 They are an additional threat due to their muscle relaxant properties.37 Other medications such as propranolol, a beta-blocker, and sildenafil, an erectile dysfunction medication, can also worsen OSA.38 Therefore, pharmacists should review medication profiles for those patients with OSA since there are few pharmacologic treatments available. Pharmacists should recommend discontinuation of medications that can have a negative impact on the treatment of OSA.
As usual, I make no claim as to the accuracy or correctness of any information provided. Also, INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.