I'm going to assume she has neuropathy from Diabetes? If so.. make sure her sugars OK - that's the MOST important thing:
Here are some alternative things other than just Lyrica/Neurontin, etc:
Benfotiamine is a transketolase activator that reduces tissue AGEs. Several independent pilot studies have demonstrated its effectiveness in diabetic polyneuropathy. The BEDIP 3-week study demonstrated subjective improvements in neuropathy scores in the group that received 200 mg daily of benfotiamine tablets, with a pronounced decrease in reported pain levels (91). In a 12-week study, the use of benfotiamine plus vitamin B6/B12 significantly improved nerve conduction velocity in the peroneal nerve along with appreciable improvements in vibratory perception. An alternate combination of benfotiamine (100 mg) and pyridoxine (100 mg) has been shown to improve diabetic polyneuropathy in a small number of diabetic patients (92)
91. Haupt E, Ledermann H, Kopcke W: Benfotiamine in the treatment of diabetic polyneuropathy--a three-week randomized, controlled pilot study (BEDIP study). Int J Clin Pharmacol Ther 43:71-77, 2005
92. Stracke H, Lindemann A, Federlin K: A benfotiamine-vitamin B combination in treatment of diabetic polyneuropathy. Exp Clin Endocrinol Diabetes 104:311-316, 1996
Alpha-Lipoic acid or thioctic acid has been used for its antioxidant properties and for its thiol-replenishing redox-modulating properties. A number of studies show its favorable influence on microcirculation and reversal of symptoms of neuropathy (98-101). A meta-analysis including 1,258 patients from four randomized clinical trials concluded that 600 mg of i.v., α-Lipoic acid daily significantly reduced symptoms of neuropathy and improved neuropathic deficits (102). The recently published SYDNEY 2 trial showed significant improvement in neuropathic symptoms and neurologic deficits in 181 diabetic patients with 3 different doses of α-Lipoic acid compared to placebo over a 5-week period (103). The result of the NATHAN study, which examined the long-term effects on electrophysiology and clinical assessments, presented at the 2007 ADA meeting, showed that 4-year treatment with α-lipoic acid in mild to moderate DSP is well tolerated and improves some neuropathic deficits and symptoms, but not nerve conduction (104)
98. Ametov AS, Barinov A, Dyck PJ, Hermann R, Kozlova N, Litchy WJ, Low PA, Nehrdich D, Novosadova M, O'Brien PC, Reljanovic M, Samigullin R, Schuette K, Strokov I, Tritschler HJ, Wessel K, Yakhno N, Ziegler D: The sensory symptoms of diabetic polyneuropathy are improved with alpha-lipoic acid: the SYDNEY trial. Diabetes Care 26:770-776, 2003
99. Ruhnau, K. J., Meissner, H. P., Finn, R., Reljanovic, M., Lobisch, M., Schutte, K., Nehrdich, D., Tritschler, H., Mehnert, H., and Ziegler, D. Effects of 3-week oral treatment with the antioxidant thioctic acid (alpha-lipoic acid) in symptomatic diabetic polyneuropathy. Diabet Med 16(12), 1040-1043. 1999.
100. Ziegler D, Hanefeld M, Ruhnau KJ, Meissner HP, Lobisch M, Schutte K, Gries FA: Treatment of symptomatic diabetic peripheral neuropathy with the anti-oxidant alpha-lipoic acid. A 3-week multicentre randomized controlled trial (ALADIN Study). Diabetologia 38:1425-1433, 1995
101. Reljanovic, M., Reichel, G., Rett, K., Lobisch, M., Schuette, K., Moller, W., Tritschler, H. J., and Mehnert, H. Treatment of diabetic polyneuropathy with the antioxidant thioctic acid (alpha-lipoic acid): a two year multicenter randomized double-blind placebo-controlled trial (ALADIN II). Alpha Lipoic Acid in Diabetic Neuropathy. Free Radic Res 31(3), 171-179. 1999.
102. Ziegler D, Nowak H, Kempler P, Vargha P, Low PA: Treatment of symptomatic diabetic polyneuropathy with the antioxidant alpha-lipoic acid: a meta-analysis. Diabet Med 21:114-121, 2004
103. Ziegler D, Ametov A, Barinov A, Dyck PJ, Gurieva I, Low PA, Munzel U, Yakhno N, Raz I, Novosadova M, Maus J, Samigullin R: Oral treatment with alpha-lipoic acid improves symptomatic diabetic polyneuropathy: the SYDNEY 2 trial. Diabetes Care 29:2365-2370, 2006
104. Ziegler D, Low PA, Boulton AJ, Vinik AI, Freeman R, Samigullin R, Tritschler H, Munzel U, Maus J, Schuette K, Dyck PJ: Effect of 4-Year Antioxidant Treatment with alpha-Lipoic Acid in Diabetic Polyneuropathy: The NATHAN 1 Trial. (Abstract). Diabetes 56:A2, 2007
There are other meds too (Duloxetine) which is a serotonin-norepinephrine reuptake inhibitor is "FDA" approved, if that means anything to you

Sometimes people need a combination of anticonvulsant (Neurontin, Topamax, Lyrica [by the way, you know lyrica is just similar to neurontin right? Pregabalin and gabapentin]) with something else too.
Also.. since you said she's 'wobbly':
Large-fiber neuropathy is manifested by reduced vibration perception and position sense, weakness and muscle wasting and depressed deep-tendon reflexes. Diabetic patients with large-fiber neuropathies are uncoordinated and ataxic, and are 17-times more likely to fall than their non-neuropathic counterparts (139). It is important, therefore, to improve strength and balance in patients with large-fiber neuropathy. Patients can benefit from high-intensity strength training by increasing muscle strength, improving coordination and balance, and thus reducing falls and fracture risks (140). Low-impact activities such as Pilates, yoga, and Tai Chi—which emphasize muscular strength and coordination, and challenge the vestibular system—may also be particularly helpful. In addition, options to prevent and correct foot deformities are available, for example orthotics, surgery and reconstruction.