Fluoroquinolones that are excreted mainly by non renal mechanisms:

Pefloxacin Trovafloxacin Grepofloxacin Nalidixic acid

GlycosaminoglycAnswer (GAGs) are heteropolysaccharides. These molecules are long unbranched polysaccharides containing a repeating disaccharide unit. The disaccharide units contain either of two modified sugars N-acetylgalactosamine (GalNAc) or N-acetylglucosamine (GlcNAc) and a uronic acid such as glucuronate or iduronate. The specific GAGs of physiological significance are hyaluronic acid, dermatan sulfate, chondroitin sulfate, heparin, heparan sulfate, and keratan sulfate.

Azithromycin Preferred agent for treatment of chlamydia infection in pregnancy in azithromycin. 
It is given as a single dose of 1g leading to high compliance rate.  

Streptomycin is contraindicated in pregnant women because of fetal ototoxicity.

Synthetic opioids, sharing properties of opium and morphine, include meperidine, propoxyphene, diphenoxylate, fentanyl, buprenorphine, methadone, and pentazocine. Various opiate effects are analgesia, respiratory depression, constipation, and euphoria.

Fentanyl (80 to 100 times more powerful than morphine) is especially dangerous.

Atropine blocks the muscarinic receptors. Atropine decreases gastrointestinal tract motility and secretion and causes constipation.

Although various derivatives and congeners of atropine (such as propantheline, isopropamide, and glycopyrrolate) have been advocated in patients with peptic ulcer or with diarrheal syndromes

Neostigmine is Cholinesterase inhibitors that enhance the effects of parasympathetic stimulation and leads to reversal of intoxication by agents with a anticholinergic action